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  #1  
Old 08-10-2010, 08:18 PM
auberon auberon is offline
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Default Narafilcon A vs. Narafilcon B

The original TruEye lenses released outside the US are Narafilcon A, which has a Dk/t of 118. The TruEye lenses recently released in the US are Narafilcon B, which has a much lower Dk/t of 65. Does anyone know why the difference?
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  #2  
Old 08-11-2010, 04:22 AM
Knotlob Knotlob is offline
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Quote:
Originally Posted by auberon View Post
The original TruEye lenses released outside the US are Narafilcon A, which has a Dk/t of 118. The TruEye lenses recently released in the US are Narafilcon B, which has a much lower Dk/t of 65. Does anyone know why the difference?
Hello auberon and welcome to the Lens 101 forum

I didn't realise that J&J had used a different lens material for the N American market. I cannot find any reason for this seemingly retrograde step, on the Internet. Questions have been asked on an Ask Acuvue forum, but so far (4 weeks later) no answer from Johnson & Johnson.

http://answers.acuvue.com/answers/4243/product/1D5/questions.htm?expandquestion=296332

As you say the Dk value of the Narafilcon B used in the N American market is only 52 (labeled 55), Dk/t 65, versus Narafilcon A with a Dk of 96 (labelled 100), Dk/t 118. The moisture content of the Narafilcon B is 48% versus 46% for the Narafilcon A.

It's really a question that only J&J can answer, but even phoning them may not give an answer, as they will doubtless say they don't know anything about the other market/product. They are certainly not advertising the difference between the two markets anyway.

knotlob
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  #3  
Old 08-11-2010, 08:46 AM
Eyeofharmony Eyeofharmony is offline
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Default Just the Facts and Figures

Quote:
Originally Posted by auberon View Post
The original TruEye lenses released outside the US are Narafilcon A, which has a Dk/t of 118. The TruEye lenses recently released in the US are Narafilcon B, which has a much lower Dk/t of 65. Does anyone know why the difference?
Hi auberon. Another new member. Welcome to Lens 101.

Would you mind telling me where you got these numbers?
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  #4  
Old 08-11-2010, 12:40 PM
auberon auberon is offline
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Quote:
Originally Posted by Eyeofharmony View Post
Would you mind telling me where you got these numbers?
Narafilcon A:
http://www.jnjvisioncare.co.uk/trueye-technical

Narafilcon B:
http://www.jnjvisioncare.com/prod-1day-trueye-product-information.jsp
(click on Technical Specifications)

There's also a comparison of the two materials on page 4 of this document:
http://www.accessdata.fda.gov/cdrh_docs/pdf10/K100349.pdf

My guess is the change is due to one or both of these reasons:
- Decreasing the silicone content to decrease the modulus so the lenses fall apart quicker to prevent abusers wearing the lenses more than once.
- Decreasing the silicone content to reduce manufacturing costs so the lens isn't priced out of the US market.
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  #5  
Old 08-11-2010, 01:39 PM
Knotlob Knotlob is offline
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Quote:
Originally Posted by auberon View Post
Narafilcon A:
http://www.jnjvisioncare.co.uk/trueye-technical

Narafilcon B:
http://www.jnjvisioncare.com/prod-1day-trueye-product-information.jsp
(click on Technical Specifications)

There's also a comparison of the two materials on page 4 of this document:
http://www.accessdata.fda.gov/cdrh_docs/pdf10/K100349.pdf

My guess is the change is due to one or both of these reasons:
- Decreasing the silicone content to decrease the modulus so the lenses fall apart quicker to prevent abusers wearing the lenses more than once.
- Decreasing the silicone content to reduce manufacturing costs so the lens isn't priced out of the US market.
The lenses are slightly thicker than the monthly Biofinity lenses!

Lens.com, this site's sponsor had some very good prices last week for 1 Day Acuvue Trueye. I would have thought there may have been a marketing opportunity for J&J as being the only provider of silicone hydrogel lenses for Daily Disposable use, but now that they have reduced the Dk value to 52, for me the benefits are now severely reduced. They could have built up a strong customer base for silicone hydrogel daily disposable lenses being first to market. If wearers are happy, they will tend to stick with that lens, unless prices become prohibitive.

As regarding longevity of the lenses, I don't know if that is their thinking behind that change. I have successfully worn a Bausch & Lomb SofLens Daily Disposable lens for several weeks with out problems (cleaning & disinfecting at night with a two step peroxide). However, that was a once off and I wear monthly lenses (Biofinity) or more usually RGP permeable lenses now - so the Bausch & Lomb experience was only to satisfy my scientific curiosity.

It doesn't really explain why J&J continue to use Narafilcon A for the European Market. True, european prices are usually higher than in the US, but is it only US Contact Lens wearers that abuse their Daily Disposable lenses .

knotlob
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  #6  
Old 08-11-2010, 02:27 PM
Captainteneel Captainteneel is offline
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Default Ditto

Quote:
Originally Posted by Knotlob View Post
The lenses are slightly thicker than the monthly Biofinity lenses!

Lens.com, this site's sponsor had some very good prices last week for 1 Day Acuvue Trueye. I would have thought there may have been a marketing opportunity for J&J as being the only provider of silicone hydrogel lenses for Daily Disposable use, but now that they have reduced the Dk value to 52, for me the benefits are now severely reduced. They could have built up a strong customer base for silicone hydrogel daily disposable lenses being first to market. If wearers are happy, they will tend to stick with that lens, unless prices become prohibitive.

As regarding longevity of the lenses, I don't know if that is their thinking behind that change. I have successfully worn a Bausch & Lomb SofLens Daily Disposable lens for several weeks with out problems (cleaning & disinfecting at night with a two step peroxide). However, that was a once off and I wear monthly lenses (Biofinity) or more usually RGP permeable lenses now - so the Bausch & Lomb experience was only to satisfy my scientific curiosity.

It doesn't really explain why J&J continue to use Narafilcon A for the European Market. True, european prices are usually higher than in the US, but is it only US Contact Lens wearers that abuse their Daily Disposable lenses .

knotlob
Right. What Knotlob said.
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  #7  
Old 08-15-2010, 10:26 PM
auberon auberon is offline
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Well, J&J posted an "answer" on their web site.

http://answers.acuvue.com/answers/4243/product/1D5/questions.htm?sort=recenta

Quote:
Thank you for your question. Since the 2008 introduction of 1•DAY ACUVUE® TruEye™ in the United Kingdom, our Research & Development team has been working diligently to further enhance the properties of this revolutionary silicone hydrogel one-day contact lens. 1•DAY ACUVUE® TruEye™ with narafilcon B is designed to deliver the same extraordinary comfort benefits as the product with narafilcon A, and to help maintain eye health. It has many of the great properties of 1•DAY ACUVUE® TruEye™ with narafilcon A, including new HYDRACLEAR® 1 technology and the highest level of UV protection in a contact lens. It also contains a higher proportion of hydrogel to silicone, which we believe further enhances lens performance.
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  #8  
Old 08-16-2010, 05:25 AM
Knotlob Knotlob is offline
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Quote:
Originally Posted by auberon View Post
Well, J&J posted an "answer" on their web site.

http://answers.acuvue.com/answers/4243/product/1D5/questions.htm?sort=recenta
Well I don't see how that answers the question really. Just a bunch of marketing guff to hide the real reason(s) for the change (whatever that is - cost saving through using less silicone, etc)?

It says both products offer the 'same extraordinary comfort', but says nothing about the drastic reduction in the US product's oxygen permeability, which I feel is the major benefit of the (European) 1 day Acuvue TruEye product over conventional hydrogel daily disposable lenses already on the market.

The US product's Dk value falls far short of the modern monthly disposables such as Air Optix and Biofinity and after all, they are all worn effectively in the same manner - daily. The differences being freedom from the lens cleaning regime and for some wearers protein build up with a daily disposable lens.

I wonder if Johnson & Johnson will go on to score an own goal by withdrawing the European Narafilcon A version and if not, how do they justify the two different products (if Johnson & Johnson believe the US improvements 'further enhances lens performance'). European prices are of course usually higher for just about everything than in the US , so perhaps the European market can continue to sustain the Narafilcon A product.

knotlob
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  #9  
Old 08-16-2010, 01:29 PM
Garfield21 Garfield21 is offline
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Quote:
Originally Posted by Knotlob View Post
I wonder if Johnson & Johnson will go on to score an own goal by withdrawing the European Narafilcon A version and if not, how do they justify the two different products (if Johnson & Johnson believe the US improvements 'further enhances lens performance'). European prices are of course usually higher for just about everything than in the US , so perhaps the European market can continue to sustain the Narafilcon A product.

knotlob
That reminds of the "New Coke" debacle back in 1985. Can you remember back that far?

Narafilcon Classic, anyone?
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  #10  
Old 08-16-2010, 01:59 PM
Knotlob Knotlob is offline
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Originally Posted by Garfield21 View Post
That reminds of the "New Coke" debacle back in 1985. Can you remember back that far?

Narafilcon Classic, anyone?
That's going back a bit, but I was never much of a fan of Coke. It will be interesting to see how things pan out on this one.

knotlob
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  #11  
Old 08-16-2010, 02:21 PM
Guinness Guinness is offline
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Quote:
Originally Posted by Knotlob View Post
That's going back a bit, but I was never much of a fan of Coke. It will be interesting to see how things pan out on this one.

knotlob
I was in high school back in the 80's and I remember being amused by all the fuss. For all the R & D the massive Coca Cola Conglomerate put into the New Coke, I couldn't tell the difference.
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  #12  
Old 08-17-2010, 07:17 PM
xxxxx1 xxxxx1 is offline
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Context: I started off wearing the UK TruEyes and ended up here after re-ordering in the US and noticing the material change.

There appears to be no detailed explanation anywhere on the internet, and calling the US physician support number was useless.

I can report that the US version has similar comfort, and doesn't (so far) cause the problems I had with the UK material: 1) end-of-day itchiness, 2) very dry eyes on the next morning after a long day of wear.
I did once fall asleep in the UK TruEyes, woke up with completely cloudy vision until lenses were rinsed with saline. Haven't repeated the experiment in the US.

On Dk/t:

"The research supports the notions that a threshold of about 50 Dk/t units exists for extended wear across all lenses, and that the clinical performance of silicone hydrogel lenses is similar in terms of hypoxia-related signs."

http://www.contactlensspectrum.com/article.aspx?article=100423


"Curve fitting for plots of change in corneal thickness versus central and peripheral Dk/t found threshold values of 19.8 and 32.6 units to avoid corneal swelling during open eye contact lens wear for a typical wearer."

http://www.ncbi.nlm.nih.gov/pubmed/19904816
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  #13  
Old 08-18-2010, 04:00 AM
Knotlob Knotlob is offline
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Quote:
Originally Posted by xxxxx1 View Post
Context: I started off wearing the UK TruEyes and ended up here after re-ordering in the US and noticing the material change.

There appears to be no detailed explanation anywhere on the internet, and calling the US physician support number was useless.

I can report that the US version has similar comfort, and doesn't (so far) cause the problems I had with the UK material: 1) end-of-day itchiness, 2) very dry eyes on the next morning after a long day of wear.
I did once fall asleep in the UK TruEyes, woke up with completely cloudy vision until lenses were rinsed with saline. Haven't repeated the experiment in the US.

On Dk/t:

"The research supports the notions that a threshold of about 50 Dk/t units exists for extended wear across all lenses, and that the clinical performance of silicone hydrogel lenses is similar in terms of hypoxia-related signs."

http://www.contactlensspectrum.com/article.aspx?article=100423


"Curve fitting for plots of change in corneal thickness versus central and peripheral Dk/t found threshold values of 19.8 and 32.6 units to avoid corneal swelling during open eye contact lens wear for a typical wearer."

http://www.ncbi.nlm.nih.gov/pubmed/19904816
Hello xxxxx1 and welcome to the forum.

Thanks for posting your experiences with both the UK and US versions of 1 Day Acuvue TruEye and also for the references. We like to hear personal experiences on this forum.

Most of the academic reports I have read suggest that a Dk of at least 80, preferably higher, is required to come near to giving the eye a full oxygen supply. My second last eye doctor stated quite bluntly that even the best of the contact lenses on the market (in Germany) were only just good enough. I don't think 1 Day Acuvue TruEye was on their list of lenses, autumn last year, but the best would have included Biofinity and Air Optix with typical Dk values of 128 and 110. The US 1 Day Acuvue TruEye has as Dk value of only 52 (55 labelled).

If you did (accidentally or deliberately) sleep with your lenses, corneal swelling I think is about 4% without lenses and about 5%/insignificant difference compared to no lens worn, with good silicone hydrogel lenses, but more with conventional hydrogel low Dk value lenses.

I don't think Johnson & Johnson are being entirely straight with their customers.

There are obviously different schools of thought on how high a Dk and Dk/t value is necessary and/or desirable.

knotlob
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  #14  
Old 08-18-2010, 12:03 PM
xxxxx1 xxxxx1 is offline
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Quote:
Originally Posted by Knotlob View Post

Most of the academic reports I have read suggest that a Dk of at least 80, preferably higher, is required to come near to giving the eye a full oxygen supply. My second last eye doctor stated quite bluntly that even the best of the contact lenses on the market (in Germany) were only just good enough. I don't think 1 Day Acuvue TruEye was on their list of lenses, autumn last year, but the best would have included Biofinity and Air Optix with typical Dk values of 128 and 110. The US 1 Day Acuvue TruEye has as Dk value of only 52 (55 labelled).

If you did (accidentally or deliberately) sleep with your lenses, corneal swelling I think is about 4% without lenses and about 5%/insignificant difference compared to no lens worn, with good silicone hydrogel lenses, but more with conventional hydrogel low Dk value lenses.

I don't think Johnson & Johnson are being entirely straight with their customers.

There are obviously different schools of thought on how high a Dk and Dk/t value is necessary and/or desirable.

knotlob

Hello knotlob,

If you have the specific references handy I'd be curious to take a look. My impression from the literature is that this area is not yet well-understood. Availability of oxygen underneath the contact lens increases in a logarithmic manner with Dk/t, so I'm less inclined to believe that 55 to 125 will show a big improvement. I also occasionally wear Oasys, which leaves my eyes just about as red at end-of-day.

Another way to examine the question is to look at oxygen respiration at altitude. I haven't seen a lot of red eyes in Bolivia, where several cities are above 3500m. There's about 35% less oxygen at this altitude, so that implies it's possible to acclimatize to a pretty wide range.
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  #15  
Old 08-18-2010, 12:26 PM
Knotlob Knotlob is offline
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Quote:
Originally Posted by xxxxx1 View Post
Hello knotlob,

If you have the specific references handy I'd be curious to take a look. My impression from the literature is that this area is not yet well-understood. Availability of oxygen underneath the contact lens increases in a logarithmic manner with Dk/t, so I'm less inclined to believe that 55 to 125 will show a big improvement. I also occasionally wear Oasys, which leaves my eyes just about as red at end-of-day.

Another way to examine the question is to look at oxygen respiration at altitude. I haven't seen a lot of red eyes in Bolivia, where several cities are above 3500m. There's about 35% less oxygen at this altitude, so that implies it's possible to acclimatize to a pretty wide range.
Hello xxxxx1

I don't have specific references to hand - maybe in some of my bookmarks, but it will take time to find them. I agree that the issue is not well understood and silicone hydrogel/higher Dk, Dk/t lens material, lenses are relatively new, so there is not such a large knowledge base yet.

I agree that there will be a diminishing return on the benefits that accrue with higher Dk lens materials, but I think that is one area where manufacturers will strive to improve, even though high Dk/t lenses on their own, do not necessarily make for a very comfortable lens.

Re the Bolivia issue, that is an interesting point, though I think Bolivian people there probably will have adapted to the reduced partial pressure of the oxygen in the atmosphere (there will still be 21% oxygen in it of course). (I think the World CIA Fact Book reckons most people live and die within 30 miles of their birth place!). It would be tourists or expatriates who may suffer adverse affects on their eyes there - though I must confess I've never thought of that. I wonder if climbers on Mt Everest have similar problems!

I have to say that I must be fortunate not to have suffered red eyes wearing contact lenses, unless I was exposed to some irritant in the atmosphere (dust, smoke or chemicals). I used to wear 'annual' Hydron/CooperVision Omniflex lenses (Dk 32, Dk/t 30), sometimes for many hours/day before switching to Biofinity and then to RGP.

knotlob
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  #16  
Old 08-18-2010, 01:14 PM
Wheatgrass Wheatgrass is offline
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Quote:
Originally Posted by xxxxx1 View Post
Hello knotlob,

If you have the specific references handy I'd be curious to take a look. My impression from the literature is that this area is not yet well-understood. Availability of oxygen underneath the contact lens increases in a logarithmic manner with Dk/t, so I'm less inclined to believe that 55 to 125 will show a big improvement. I also occasionally wear Oasys, which leaves my eyes just about as red at end-of-day.

Another way to examine the question is to look at oxygen respiration at altitude. I haven't seen a lot of red eyes in Bolivia, where several cities are above 3500m. There's about 35% less oxygen at this altitude, so that implies it's possible to acclimatize to a pretty wide range.
Wow, it looks like we have a couple of really smart members of Lens 101. I think I'll just step back . . .
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  #17  
Old 08-18-2010, 09:50 PM
auberon auberon is offline
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Thanks for the first-hand comparison of the two materials xxxxx1. The link with the logarithmic graph of % oxygen availability vs. Dk/t is very interesting too. It seems like maybe % oxygen is the better way to compare lenses.

For Narafilcon A, J&J states 98% oxygen availability and 100% oxygen consumption. For Narafilcon B, J&J states 96% oxygen availability, but I wasn't able to find an oxygen consumption number.
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  #18  
Old 08-19-2010, 12:07 PM
Eldradmustlive Eldradmustlive is offline
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Quote:
Originally Posted by auberon View Post
Thanks for the first-hand comparison of the two materials xxxxx1. The link with the logarithmic graph of % oxygen availability vs. Dk/t is very interesting too. It seems like maybe % oxygen is the better way to compare lenses.

For Narafilcon A, J&J states 98% oxygen availability and 100% oxygen consumption. For Narafilcon B, J&J states 96% oxygen availability, but I wasn't able to find an oxygen consumption number.
I went to the Johnson & Johnson site, and when I did a search for "Narafilcon B", it took me to the TruEyes contact lens page, which states an oxygen consumption of 100%, but then says they're made of Narafilcon A.

Here's where you can contact customer care: http://www.jnjvisioncare.com/customer-service.jsp

It would probably be faster for you to shoot them an email than for me to do it and then log back in and post the results and then wait for you to log in and read my post, ya know?
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Old 08-21-2010, 08:40 AM
xxxxx1 xxxxx1 is offline
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I emailed J&J US several days ago, without a response. I also rang the head office in the UK, which promised to email a clarification but have not. They did say they were unaware of plans to switch the UK to B.

This isn't really appropriate behavior for a medical device manufacturer; if they'd been selling A in the US and switched to B, they'd need to file a rationale with FDA.

Are there any journalists on this site? A negative story ("Is the US getting inferior products compared to Europe?") seems the most likely way to shake loose a real answer at this point.
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  #20  
Old 08-22-2010, 04:53 AM
Knotlob Knotlob is offline
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Quote:
Originally Posted by xxxxx1 View Post
I emailed J&J US several days ago, without a response. I also rang the head office in the UK, which promised to email a clarification but have not. They did say they were unaware of plans to switch the UK to B.

This isn't really appropriate behavior for a medical device manufacturer; if they'd been selling A in the US and switched to B, they'd need to file a rationale with FDA.

Are there any journalists on this site? A negative story ("Is the US getting inferior products compared to Europe?") seems the most likely way to shake loose a real answer at this point.
A lot of these contact lens companies are very poor at replying to contact lens wearers and seem to regard them as beneath their dignity to reply to. When they do, it's usually a white wash job anyway.

I think you're right that they need some 'encouragement' to reply to your email.

knotlob
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Old 08-23-2010, 01:10 PM
Mondas2 Mondas2 is offline
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Quote:
Originally Posted by Knotlob View Post
A lot of these contact lens companies are very poor at replying to contact lens wearers and seem to regard them as beneath their dignity to reply to. When they do, it's usually a white wash job anyway.

I think you're right that they need some 'encouragement' to reply to your email.

knotlob
Do you think that Lens 101 can do anything to "encourage" cooperation from Acuvue, other than what we've already done in this thread?
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Old 08-25-2010, 06:00 AM
Knotlob Knotlob is offline
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Originally Posted by Mondas2 View Post
Do you think that Lens 101 can do anything to "encourage" cooperation from Acuvue, other than what we've already done in this thread?
Only if Acuvue actually monitor this forum, which is questionable. Many commercial companies will not monitor forums such as these because although they may be a useful source of consumer feedback, everybody who posts here is effectively anonymous. So I can understand why some companies would not get involved officially with such forums.

However, I'm sure we would all welcome an official spokesperson from each manufacturer to comment, where appropriate, provided their replies were informative and helpful, instead of the typical marketing motherhood statements which we have come to know and love .

knotlob
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Old 08-25-2010, 08:22 AM
xxxxx1 xxxxx1 is offline
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For the record, I eventually received the email below, although it adds no new information.

It might suffice to contact the US PR office and point out that this thread is #3 on Google for "Narafilcon B" - I'll leave that to a more senior forum member.

There's currently a recall of TruEyes sold in Australia, Asia and Europe, so anyone ordering overseas should be cautious:

http://www.heraldsun.com.au/news/breaking-news/johnson-johnson-recalls-1-day-acuvue-trueye-brand-contact-lenses/story-e6frf7ko-1225909224222


Quote:
Thank you for your recent enquiry and I apologise for the delay in responding.

I have consulted our Professional Affairs Director who has confirmed the material launched in the United States is slightly different to the material launched in Europe. The product does not currently carry a CE mark and as such should not be sold in Europe. There is a difference in modulus and oxygen permeability.

We would advise you to continue wearing the product as prescribed by your eye care professional in Europe. At this time we are unable to say at what point Narafilcon B will be available in Europe.

If we can be of any further help, please do not hesitate to contact us.

Kind regards

Amanda Coote
Johnson & Johnson Vision Care
UK & Ireland Customer Care Adviser
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  #24  
Old 08-25-2010, 09:03 AM
Jurassicmark Jurassicmark is offline
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Quote:
Originally Posted by xxxxx1 View Post
For the record, I eventually received the email below, although it adds no new information.

It might suffice to contact the US PR office and point out that this thread is #3 on Google for "Narafilcon B" - I'll leave that to a more senior forum member.

There's currently a recall of TruEyes sold in Australia, Asia and Europe, so anyone ordering overseas should be cautious:

http://www.heraldsun.com.au/news/breaking-news/johnson-johnson-recalls-1-day-acuvue-trueye-brand-contact-lenses/story-e6frf7ko-1225909224222
Thanks for the "information" about Narafilcon A versus B, xxxxx1. You're right; the response you got was not very helpful, but I like the "continue wearing the product as prescribed" part.

The recall information is good to have as well.

Finally, it's good to know that this thread ranks well in Google.
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Old 08-25-2010, 09:44 AM
Knotlob Knotlob is offline
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Quote:
Originally Posted by xxxxx1 View Post
For the record, I eventually received the email below, although it adds no new information.

It might suffice to contact the US PR office and point out that this thread is #3 on Google for "Narafilcon B" - I'll leave that to a more senior forum member.

There's currently a recall of TruEyes sold in Australia, Asia and Europe, so anyone ordering overseas should be cautious:

http://www.heraldsun.com.au/news/breaking-news/johnson-johnson-recalls-1-day-acuvue-trueye-brand-contact-lenses/story-e6frf7ko-1225909224222
Thanks for that link.

J&J seem to have dropped the ball somewhat, recently, on their Quality Control. It wasn't long ago they were mentioned on this forum for quality problems and drawing the attention of the regulatory authorities to their operations.

I am surprised that so many lenses managed to get to the other side of the world from Ireland, before they issued a recall. If they were on the ball, they should have noticed this rinsing stage fault in their manufacturing process much earlier and quarantined the batches affected. Much less embarrassing than issuing a world wide product recall!

knotlob
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  #26  
Old 08-25-2010, 10:37 AM
Wookiee74 Wookiee74 is offline
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Default Worldwide Recall Faux Pas

Quote:
Originally Posted by Knotlob View Post
If they were on the ball, they should have noticed this rinsing stage fault in their manufacturing process much earlier and quarantined the batches affected. Much less embarrassing than issuing a world wide product recall!

knotlob
No kidding.

Oops.
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  #27  
Old 08-25-2010, 11:26 AM
autumn_leaf autumn_leaf is offline
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so this is my first post.

I'm new to contacts. just got my prescription finalized yesterday and it was surprisingly the same as my glasses with left -2.75 and right -2.5

so onward to this subject. i got my trial pair which were oasys but planned on getting 1 day ones from acuvue since those can be used for up to 1 week so the cost was excellent. when i told my doctor this she gave me 5 free pairs of the new Acuvue Trueye contacts. I noticed the material differences and came to this site.

I still plan on using these for a 1 week each pair or less if they start blurring out faster. the Oasys contacts seems to last me only about 4-6 hrs each day before drying out and becoming very noticeable.

Today will be my first day wearing the Trueye contacts and I have the narafilcon b material since I'm in the US. I will post daily reviews of what the experience is and the differences from exceeding more than one day with them. I will not be sleeping in them cause that's too much of a risk in my mind.

A note on the Oasys: for the first 2 weeks i had them my eyes were getting really bloodshot so i started to wear them every other day. i don't know if this is from the lack of oxygen or from me poking my eye several times since I'm new at this. The doctor told me it was the latter since the contacts look great on me. hopefully I'll post tonight to give my first impressions.
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  #28  
Old 08-25-2010, 11:59 AM
Scienceguy Scienceguy is offline
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Default Clearing a Few Things Up

Quote:
Originally Posted by autumn_leaf View Post
so this is my first post.

I'm new to contacts. just got my prescription finalized yesterday and it was surprisingly the same as my glasses with left -2.75 and right -2.5

so onward to this subject. i got my trial pair which were oasys but planned on getting 1 day ones from acuvue since those can be used for up to 1 week so the cost was excellent. when i told my doctor this she gave me 5 free pairs of the new Acuvue Trueye contacts. I noticed the material differences and came to this site.

I still plan on using these for a 1 week each pair or less if they start blurring out faster. the Oasys contacts seems to last me only about 4-6 hrs each day before drying out and becoming very noticeable.

Today will be my first day wearing the Trueye contacts and I have the narafilcon b material since I'm in the US. I will post daily reviews of what the experience is and the differences from exceeding more than one day with them. I will not be sleeping in them cause that's too much of a risk in my mind.

A note on the Oasys: for the first 2 weeks i had them my eyes were getting really bloodshot so i started to wear them every other day. i don't know if this is from the lack of oxygen or from me poking my eye several times since I'm new at this. The doctor told me it was the latter since the contacts look great on me. hopefully I'll post tonight to give my first impressions.
Welcome to Lens 101 autumn_leaf. It's nice to see a lot of new names, if not new faces, on the board.

First off, a bit of forum etiquette. When you want to comment on someone's question, just tack it onto the end of that thread. If you have a new question, please start a new thread. It's like you're talking to someone about which is the best Star Wars movie and then I go "Say, how about that wacky Captain Kirk, huh?"

Now that that's out of the way, did you say that "1 day [contact lenses] from Acuvue" can last for "up to 1 week"? Did your eye care professional tell you that you can wear contact lenses called "1 day" for a week? There's some controversy on this subject, but my opinion is to err on the side of caution and wear 1-day lenses for 1 day.

I'm looking forward to your future posts; just make sure you and your eye care professional are on the same page for how long you can wear them. The best person to tell you how long you can wear your contacts would be the person who has personally examined your eyes. I wish you well.
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  #29  
Old 08-25-2010, 12:01 PM
Knotlob Knotlob is offline
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Quote:
Originally Posted by autumn_leaf View Post
so this is my first post.

I'm new to contacts. just got my prescription finalized yesterday and it was surprisingly the same as my glasses with left -2.75 and right -2.5

so onward to this subject. i got my trial pair which were oasys but planned on getting 1 day ones from acuvue since those can be used for up to 1 week so the cost was excellent. when i told my doctor this she gave me 5 free pairs of the new Acuvue Trueye contacts. I noticed the material differences and came to this site.

I still plan on using these for a 1 week each pair or less if they start blurring out faster. the Oasys contacts seems to last me only about 4-6 hrs each day before drying out and becoming very noticeable.

Today will be my first day wearing the Trueye contacts and I have the narafilcon b material since I'm in the US. I will post daily reviews of what the experience is and the differences from exceeding more than one day with them. I will not be sleeping in them cause that's too much of a risk in my mind.

A note on the Oasys: for the first 2 weeks i had them my eyes were getting really bloodshot so i started to wear them every other day. i don't know if this is from the lack of oxygen or from me poking my eye several times since I'm new at this. The doctor told me it was the latter since the contacts look great on me. hopefully I'll post tonight to give my first impressions.
Hello autumn_leaf

Welcome to the forum.

I think your optician was correct is saying that lack of oxygen permeability in the Oasys lenses was not the problem for your red eyes. Poking about in your eye (if you are a new contact lens wearer) is quite a probable source of red eyes or if that doesn't go away after you become more adept at handling your lenses, some incompatibility with your lens solutions may be another reason.

I agree that it is not sensible to wear contact lenses 24 hours/day. It increases the risks of corneal infections/ulcers, etc.

There won't usually be much difference in spectacle and contact lens prescriptions (vertex correction) when your spherical correction is weaker than -4.00 D.

I am not sure I understand what you mean by wearing the Daily lenses more than one day. Who says it is OK to wear them one week - your optician?

If you are going to do a trial with the 1 Day Acuvue TruEye, US Version, it would be more useful to members of the forum if you reported the performance during one day's wear only. You should only wear the lens one day, particularly since it is a new lens to you. Best stick to you optician's wearing recommendations as they have examined your eyes.

knotlob
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  #30  
Old 08-25-2010, 01:13 PM
Goliath2001 Goliath2001 is offline
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Quote:
Originally Posted by Knotlob View Post
Hello autumn_leaf

Welcome to the forum.

If you are going to do a trial with the 1 Day Acuvue TruEye, US Version, it would be more useful to members of the forum if you reported the performance during one day's wear only. You should only wear the lens one day, particularly since it is a new lens to you. Best stick to you optician's wearing recommendations as they have examined your eyes.

knotlob
I agree completely. If autumn_leaf wants to report on how well the 1-Day TruEye contacts work, it would be best to test them as a daily lens--the way they were intended to be worn.
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  #31  
Old 08-25-2010, 01:51 PM
xxxxx1 xxxxx1 is offline
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Quote:
Originally Posted by Goliath2001 View Post
If autumn_leaf wants to report on how well the 1-Day TruEye contacts work, it would be best to test them as a daily lens--the way they were intended to be worn.
(S)he is probably thinking back to when daily and monthly lenses were identical except for the name on the box. Dailies still don't self-destruct after 24h, so it will be an interesting experiment.

I don't see a safety risk so long as (s)he uses a two-step peroxide system or Clear Care (+rubbing +rinsing) and discards as soon as they become uncomfortable. They took narafilcon A to the clinic for 7-day wear:

http://clinicaltrials.gov/ct2/show/NCT00934102?term=narafilcon&rank=11
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  #32  
Old 08-25-2010, 02:11 PM
Aaroncablemom Aaroncablemom is offline
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Quote:
Originally Posted by xxxxx1 View Post
(S)he is probably thinking back to when daily and monthly lenses were identical except for the name on the box. Dailies still don't self-destruct after 24h, so it will be an interesting experiment.

I don't see a safety risk so long as (s)he uses a two-step peroxide system or Clear Care (+rubbing +rinsing) and discards as soon as they become uncomfortable. They took narafilcon A to the clinic for 7-day wear:

http://clinicaltrials.gov/ct2/show/NCT00934102?term=narafilcon&rank=11
I thought that one of the reasons that daily disposable contact lenses aren't intended to be used for more than one day was because they don't stand up to being cleaned. They're like paper napkins. They're meant to be thrown away, not cleaned and re-used, right? I think it would be better to be safe than sorry. If you're worried about "wasting money" then maybe dailies are not for you.
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  #33  
Old 08-25-2010, 03:38 PM
Knotlob Knotlob is offline
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Originally Posted by Aaroncablemom View Post
I thought that one of the reasons that daily disposable contact lenses aren't intended to be used for more than one day was because they don't stand up to being cleaned. They're like paper napkins. They're meant to be thrown away, not cleaned and re-used, right? I think it would be better to be safe than sorry. If you're worried about "wasting money" then maybe dailies are not for you.
I think the physical (test to destruction) life of a Daily Disposable lens is variable. Some are very fragile, but others could probably be worn longer. Disinfection in Clear Care and possibly ultrasonic cleaning could extend the lifetime of the lens, but other factors such as protein deposits on the lens would have to be considered and of course if the lens became mechanically damaged, that would be terminal for the contact lens.

I think if you want to wear a lens longer, then go for a one or two week or even a Monthly Disposable lens.

knotlob
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  #34  
Old 08-25-2010, 04:19 PM
RacerX RacerX is offline
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Quote:
Originally Posted by Knotlob View Post
I think the physical (test to destruction) life of a Daily Disposable lens is variable. Some are very fragile, but others could probably be worn longer. Disinfection in Clear Care and possibly ultrasonic cleaning could extend the lifetime of the lens, but other factors such as protein deposits on the lens would have to be considered and of course if the lens became mechanically damaged, that would be terminal for the contact lens.

I think if you want to wear a lens longer, then go for a one or two week or even a Monthly Disposable lens.

knotlob
Wow, what an interesting thread. All the time I was reading about how it just might be possible to wear daily disposable contact lenses more than daily, I couldn't wait to log in and say "If you don't like the idea of throwing away your contact lenses every day, then don't wear dailies! Go for the weekly or monthly lenses." It looks like knotlob already said that by now, though.

Do you really save money by wearing daily contact lenses for a week? Is there an actual financial gain to be had here?
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  #35  
Old 08-25-2010, 05:03 PM
autumn_leaf autumn_leaf is offline
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lots of replies already. so lets get started

1. thanks for the welcome everyone.

2. i do know forum etiquette since i've been apart of the Talk Tennis forum for a few years now and know how easily flame wars can start and how hopefully not to hijack threads.

3. my doctor told me that if i wanted to wear the trueye contacts for more than one day that i should take regular care of them, but if they ever start to bother me to throw them out, which is what i would have done anyways. she did not see any harm from wearing them 2-3 days instead of just daily.

4. I infer that these lenses can be used for more than one day given the previous lost suit against J&J. I actually read that on this forum when doing research on people using contact lenses longer than prescribed when people started mentioning that dailies were the same material as 2 week ones. while the material differed slightly it seems that there was a citing of a 2001 law suit against J&J for misleading customers and eye care professionals that 1 day contacts could only be used for one day. Can't find the article itself because it's prolly archived but here is the citing from http://www.greenamericatoday.org/programs/responsibleshopper/company.cfm?id=246

"Johnson & Johnson has agreed to pay a settlement of up to $860 million after a class action lawsuit accused the company of giving consumers incorrect instructions regarding the wearing of contact lenses. Johnson & Johnson allegedly misled consumers by recommending that they use 1-Day Acuvue disposable contact lenses only once, although the lenses are just the same as regular Acuvue lenses, that can be worn for 2 weeks. Using this marketing ploy, lawyers' consultants contend that "Johnson & Johnson bilked consumers out of more than $1.1 billion through its labeling and packaging of the 1-Day Acuvue lenses."

-- New York Times, 10/26/2001"

5. i forgot to mention in the first post i emailed vision direct if they're suppling customers with narfilicon A or B since the site didn't state which one. Hoping to hear back from them soon.

6. i am a he.

7. i find it really hard to follow recommendations by J&J given that their sites and other contact companies sites for different countries have different recommendations for the same product. something just doesn't seem right here. and the material composition isn't even made clear; they don't disclose information of this nature very well do they. why do we even need to discuss A vs B after a month the product has been released, shouldn't it have been stated when the product was released?

8. Initial Review- umm should i start a separate thread for this? here it is anyways:

the contact seems almost identical to the Oasys i had the past 2 weeks.

- breatheability does seem to be better.
- clarity is the same when i got the Oasys in the beginning.
- as with the oasys i have began to notice the contact drying out a bit around the 4-5 hr mark. I really do think these contacts work best outside. I'm usually cramped in a store all day so i think the lack of circulation of air causes it to dry out more.
- to the dismay of some i have just taken out the contacts, rinsed them, and stored them with the opti-free.

9. i use opti-free replenish as my solution since it was recommended by my doctor though i am researching others. opti-free seems to have quite a high review among solutions though so i might just stick with it. the redness seems to have faded a bit, maybe due to lessing poking. any real reason to change from this solution?
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  #36  
Old 08-26-2010, 06:51 AM
autumn_leaf autumn_leaf is offline
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Well i just received a ridiculous answer from V D.

Here was my original inquiry

Quote:
Hi,
I'm a new to contact lenses and have received free trial pairs of Acuvue Trueye contact lenses. Doing my research of the lenses it became apparent that there is a difference in material for the US market and European markets in regards to narafilcon B (US market) and narafilcon A (European market). I was wondering which material is offered in your inventory of Trueye.
Thank you,
- David
Their response

Quote:
Dear David,

Thank you for contacting Vision Direct with your product question.

In response to your email, please be advised that Vision Direct is not the manufacturer of the Acuvue Trueye. As an online retailer of the product, we are not able to answer your question.

In order to ensure you are receiving the most accurate information available, we recommend that you contact the manufacturer of the product to obtain further assistance. I apologize for any confusion, and appreciate your patience in this matter.

Again David, thank you for contacting Vision Direct. If you have any further questions or concerns, please feel free to contact us again. We appreciate your business!
Like seriously??? they don't know what they're selling even if it should be clearly labeled on the box??

My response:

Quote:
I understand that Vision Direction is not the manufacturer, but the material listed should be either right on the box or on the contact packages? The free trial contacts I received from my doctor had narafilicon b written right on the package.

-David
Does anyone know what type lens.com supply? I'm considering all options and since it's my first time ordering contacts I'm a bit hesitant ordering from a retailer that doesn't even know their product.
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  #37  
Old 08-26-2010, 07:14 AM
Knotlob Knotlob is offline
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Quote:
Originally Posted by autumn_leaf View Post
Well i just received a ridiculous answer from V D.

Here was my original inquiry



Their response



Like seriously??? they don't know what they're selling even if it should be clearly labeled on the box??

My response:



Does anyone know what type lens.com supply? I'm considering all options and since it's my first time ordering contacts I'm a bit hesitant ordering from a retailer that doesn't even know their product.
Hi David

Lens.com is American so will sell the Narafilcon B product and this is what they have on their website.

http://www.lens.com/contact-lenses/lens640.asp

Sometimes Lens.com and other sites contain typos, but it is certain that as they are in the US, it will be Narafilcon B (as approved by the US FDA).

On your other question re the lens solution, if your eyes are getting better with less poking about, then stick with the current lens solution. If it ain't broke, don't fix it.

If you want to change solutions, then Clear care/AOSept is usually the recommended one as it doesn't contain preservatives.

knotlob
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  #38  
Old 08-26-2010, 07:47 AM
autumn_leaf autumn_leaf is offline
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Quote:
Originally Posted by Knotlob View Post
Hi David

Lens.com is American so will sell the Narafilcon B product and this is what they have on their website.

http://www.lens.com/contact-lenses/lens640.asp

Sometimes Lens.com and other sites contain typos, but it is certain that as they are in the US, it will be Narafilcon B (as approved by the US FDA).

On your other question re the lens solution, if your eyes are getting better with less poking about, then stick with the current lens solution. If it ain't broke, don't fix it.

If you want to change solutions, then Clear care/AOSept is usually the recommended one as it doesn't contain preservatives.

knotlob
thanks for the quick reply knotlob. here's what i got from v d.

the main part of their response.

Quote:
In response to your inquiry, we apologize for any confusion. Unfortunately the product information screen on our website does not specify a list of materials for the TruEye lenses so I am unable to advise you which narafilicon is in the lenses we carry. However, please note that we are a company based in the US and we are not currently authorized to ship our inventory of TruEye lenses internationally. This would tend to indicate that our inventory would be made from the materials for the US market only.
i know that usually items are separated into warehouses, but the inability to confirm materials is for lack of better words, scary, to me. do they even see the product at all? All the company said after that was to ask J&J about it. . .
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  #39  
Old 08-26-2010, 07:53 AM
Knotlob Knotlob is offline
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Quote:
Originally Posted by autumn_leaf View Post
thanks for the quick reply knotlob. here's what i got from v d.

the main part of their response.



i know that usually items are separated into warehouses, but the inability to confirm materials is for lack of better words, scary, to me. do they even see the product at all? All the company said after that was to ask J&J about it. . .
Yes, that is the problem with Mail Order companies. Very often (especially in consumer electronics) they are just box shifters and are pretty clueless about the product.

I would normally ask the manufacturers, but very often as far as contact lens manufacturers go, they don't seem to want to talk to the plebs, sorry I mean their Loyal Customers .

knotlob
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  #40  
Old 08-26-2010, 09:03 AM
LP39A LP39A is offline
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Default Wherever Shall I Go?

This is a very interesting thread here folks. I've learned a lot. Thank you for doing the leg work autumn_leaf and to knotlob for sharing your vast knowledge of contact lenses once again.

If the mail order companies are just "box shifters" and the manufacturers can't be bothered with the "plebs," then where does one go for questions about contact lenses?

Other than Lens 101, of course,
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  #41  
Old 08-26-2010, 09:18 AM
Knotlob Knotlob is offline
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Quote:
Originally Posted by LP39A View Post
This is a very interesting thread here folks. I've learned a lot. Thank you for doing the leg work autumn_leaf and to knotlob for sharing your vast knowledge of contact lenses once again.

If the mail order companies are just "box shifters" and the manufacturers can't be bothered with the "plebs," then where does one go for questions about contact lenses?

Other than Lens 101, of course,
Well the manufacturers provide some limited information on their websites, but that very often is severely 'dumbed down'.

They really want you to talk to your own Eye Care Professional of course, though that has a couple of problems.

Your Eye Care Professional may charge extra for the additional consultation that you will need outside your normal annual scheduled visits.

In my case, because I ask a lot of questions (which although very good, my eye care professional hasn't thought about, or just doesn't know) she asks me to speak directly to the Contact Lens manufacturer. Sometimes this is a bit of a chore if they stone wall and won't give a straight answer. Persistence helps, but in the case of email, 9 times out of 10 you may get fobbed off by an answer seemingly chosen at random from their stock supply and they haven't even bothered to read your question carefully .

knotlob
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  #42  
Old 08-26-2010, 09:54 AM
ReTina ReTina is offline
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Quote:
Originally Posted by Knotlob View Post
Well the manufacturers provide some limited information on their websites, but that very often is severely 'dumbed down'.

They really want you to talk to your own Eye Care Professional of course, though that has a couple of problems.

Your Eye Care Professional may charge extra for the additional consultation that you will need outside your normal annual scheduled visits.

In my case, because I ask a lot of questions (which although very good, my eye care professional hasn't thought about, or just doesn't know) she asks me to speak directly to the Contact Lens manufacturer. Sometimes this is a bit of a chore if they stone wall and won't give a straight answer. Persistence helps, but in the case of email, 9 times out of 10 you may get fobbed off by an answer seemingly chosen at random from their stock supply and they haven't even bothered to read your question carefully .

knotlob
Good questions LP39A.

So, other than my eye doctor, I really have no viable option for finding information about contact lenses, is that what I'm reading?

Unless, like you knotlob, I'm a "Stump the Doc" champion.
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  #43  
Old 08-26-2010, 12:19 PM
Knotlob Knotlob is offline
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Originally Posted by ReTina View Post
Good questions LP39A.

So, other than my eye doctor, I really have no viable option for finding information about contact lenses, is that what I'm reading?

Unless, like you knotlob, I'm a "Stump the Doc" champion.
LOL. Yes, that's about the size of it. But I would still try the manufacturer first. Some are better than others. I haven't had much joy with CooperVision USA though.

I personally wouldn't expect a Mail Order company, even a good one, to be able to answer some of the more technical questions, unless they have a specialist in contact lenses resident in their Customer Service Department.

knotlob
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  #44  
Old 08-26-2010, 03:20 PM
Sevateem1 Sevateem1 is offline
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Originally Posted by Knotlob View Post
I personally wouldn't expect a Mail Order company, even a good one, to be able to answer some of the more technical questions, unless they have a specialist in contact lenses resident in their Customer Service Department . . .
. . . and what are the chances of that?
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  #45  
Old 08-26-2010, 03:38 PM
autumn_leaf autumn_leaf is offline
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Originally Posted by Sevateem1 View Post
. . . and what are the chances of that?
it's customer service... if they were a contact lens specialist they would probably be helping the lens companies personally or be working in stores such as lens crafters or such.

the more i think about the email the more it worries me. i always thought big online companies that dispense items would know more about the items they are selling. maybe i have just been spoiled being on a tennis forum where the sponsors knew a lot about the product and even experimented with it (a lot easier with racquets/strings then with contacts, i know). but right now i'm just seeing these companies are pure retail, not even that, they prolly don't handle any of the merchandise at all, just blips on a computer screen.

as for the trueye that i'm re-using ( i know some are cringing ) . today they seemed to work just as well if not better than they did yesterday, prolly cause i was outside for most of the time this morning. So far I wore them 6 hrs today, they're in solution now, but i might wear them later at night too for another tennis match. so ~10 hrs total us so far with these lenses.

feeling the lens in my fingers i can tell that it's a bit thinner but it handled rinsing just fine. the clarity is fine, the dryness is the exact same if not better. I guess I would be more likely to follow the manufacturer recommendations if they gave me any reason to. Like having charts and reasons for the life a contact lens, instead of just giving us basic instructions and refuse to give anything more unless we consistently pester them and maybe a lawsuit.
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  #46  
Old 08-26-2010, 04:07 PM
Knotlob Knotlob is offline
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I guess I would be more likely to follow the manufacturer recommendations if they gave me any reason to. Like having charts and reasons for the life a contact lens, instead of just giving us basic instructions and refuse to give anything more unless we consistently pester them and maybe a lawsuit.
Yes, I agree there. I cannot ever get a satisfactory answer out of the manufacturers as to what determines the life of the contact lens, for which they have specified Daily/2 Weekly/Monthly, etc.

They all know that too many users do 'abuse' their lenses by wearing them for maybe two months instead of one month, but they refuse to say what the physical reason is for changing the lens per schedule - other than 'just because'. Others will say that there is no actual reason why you can't wear a lens longer than the recommended time, but they won't put it in writing for their own lenses.

My optician suggested it was due to a gradual reduction in oxygen permeability (Dk value), but I would have thought that you would recognise this as discomfort. You do with annual lenses after say 9 months.

knotlob
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  #47  
Old 08-26-2010, 04:07 PM
Sevateem1 Sevateem1 is offline
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Quote:
Originally Posted by autumn_leaf View Post
it's customer service... if they were a contact lens specialist they would probably be helping the lens companies personally or be working in stores such as lens crafters or such.

the more i think about the email the more it worries me. i always thought big online companies that dispense items would know more about the items they are selling. maybe i have just been spoiled being on a tennis forum where the sponsors knew a lot about the product and even experimented with it (a lot easier with racquets/strings then with contacts, i know). but right now i'm just seeing these companies are pure retail, not even that, they prolly don't handle any of the merchandise at all, just blips on a computer screen.

as for the trueye that i'm re-using ( i know some are cringing ) . today they seemed to work just as well if not better than they did yesterday, prolly cause i was outside for most of the time this morning. So far I wore them 6 hrs today, they're in solution now, but i might wear them later at night too for another tennis match. so ~10 hrs total us so far with these lenses.

feeling the lens in my fingers i can tell that it's a bit thinner but it handled rinsing just fine. the clarity is fine, the dryness is the exact same if not better. I guess I would be more likely to follow the manufacturer recommendations if they gave me any reason to. Like having charts and reasons for the life a contact lens, instead of just giving us basic instructions and refuse to give anything more unless we consistently pester them and maybe a lawsuit.
I dunno, Autumn. I read something earlier here in Lens 101 that said that daily disposable contacts can be worn for longer than a day, but why take the risk? If you're diabetic, for example, and have to give yourself shots of insulin, it may not kill you in spectacular fashion if you use a needle twice, but there is a risk of infection, and who needs that? I think that if you are of the opinion that throwing away a pair of contact lenses after wearing them once is a waste, you might want to switch to weekly contacts.

On www.Lens.com a 30-day supply of 1-Day Acuvue TruEye (two boxes) will set you back about a hundred dollars (We won't factor in the rebate they they're currently offering.)

Two boxes of Acuvue 1-2 week lenses will last you for six weeks if you don't sleep in them. (I though that would be fair since you don't typically sleep in the dailies either.) Those two boxes will cost you a little less than 34 dollars.

Then you've got to factor in cleaning solution. A 12 ounce bottle of Clear Care will cost you about $10.00. So now you're up to about $44.00. Still less than half the cost of a month's supply TruEye.

These are just theoretical numbers I'm finding on line. If anyone has more accurate figures, please, post here and be more helpful than I am.
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Old 08-26-2010, 04:23 PM
Knotlob Knotlob is offline
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Originally Posted by Sevateem1 View Post

On www.Lens.com a 30-day supply of 1-Day Acuvue TruEye (two boxes) will set you back about a hundred dollars (We won't factor in the rebate they they're currently offering.)
I think that longer term disposables are always cheaper than Daily Disposables, even after factoring in the solutions.

I think you are somewhat adrift in the 1 Day Acuvue TruEye pricing.

I make it about $45/month, not $100, ignoring any rebate.

i.e. 90 lens box costs $68. So 60 lenses (one month supply for two eyes) will cost $68*60/90 = $45.30.

Of course you would need two boxes if your eye prescriptions were different but over a year that works out at $45/month.

knotlob
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Old 08-26-2010, 04:24 PM
autumn_leaf autumn_leaf is offline
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Originally Posted by Knotlob View Post

My optician suggested it was due to a gradual reduction in oxygen permeability (Dk value), but I would have thought that you would recognise this as discomfort. You do with annual lenses after say 9 months.

knotlob
see that is exactly what i think. i thought my bloodshot eyes were cause by lack of oxygen, which my eye doctor checked and said it wasn't. so now i'm left with poking in the eye or contact solution (going to do research on this, so far i hear good things about the clear care and aquify). after researching contact lenses i do know that many abuse their lenses and doctors can't find anything wrong with their eyes, it's usually the people that decide to sleep in their lenses that have problems (something i would never do after reading all the horror stories).

also, what your optician suggests about DK value dropping should be measurable since they can measure the initial value. contact lenses has been out for many decades and i haven't seen any clinical studies for this. and it's really important for them to have it, proving that daily contacts should be only worn daily.

there are always people that spout out what the manufacturers tell them. no offense to the above posters, but i'm using this as an example for dailies:

. they are made out of cheaper material and can't stand up to cleaning- while they might or might not be made from cheaper material (i do notice that they feel thinner even though i believe they were stated to be thicker, maybe i can compress them more) they held to being rinsed fine. i rinsed them twice already and they seem just as durable as my Oasys.

. the contacts might fall apart / deteriorate in your eye - i think if it was that fragile i wouldn't have been to rinse them. and if they are starting to dry out i take them out. my doctor said about contacts "it's really just about common sense" if it bothers you, take them out, see the doctor for an exam.
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Old 08-26-2010, 05:11 PM
autumn_leaf autumn_leaf is offline
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Originally Posted by Sevateem1 View Post
I dunno, Autumn. I read something earlier here in Lens 101 that said that daily disposable contacts can be worn for longer than a day, but why take the risk? If you're diabetic, for example, and have to give yourself shots of insulin, it may not kill you in spectacular fashion if you use a needle twice, but there is a risk of infection, and who needs that? I think that if you are of the opinion that throwing away a pair of contact lenses after wearing them once is a waste, you might want to switch to weekly contacts.

On www.Lens.com a 30-day supply of 1-Day Acuvue TruEye (two boxes) will set you back about a hundred dollars (We won't factor in the rebate they they're currently offering.)

Two boxes of Acuvue 1-2 week lenses will last you for six weeks if you don't sleep in them. (I though that would be fair since you don't typically sleep in the dailies either.) Those two boxes will cost you a little less than 34 dollars.

Then you've got to factor in cleaning solution. A 12 ounce bottle of Clear Care will cost you about $10.00. So now you're up to about $44.00. Still less than half the cost of a month's supply TruEye.

These are just theoretical numbers I'm finding on line. If anyone has more accurate figures, please, post here and be more helpful than I am.
i've done out the math before. with everything except rebates i can prolly get a 90 day supply of trueye for around $110-$120.

as for why take the risk, well i guess i'm just a dare devil.

being frugal is one thing, the other thing is the fact that i shouldn't have to distrust information by the manufacturer. too many things just doesn't make sense.

back to frugality. if these lenses can last 3 days then 90 pairs of contacts can last me near a year (given that some days i won't wear them). making contact lenses much more affordable for most, i.e. me.

on the note of waste. i think i would be the same way with 2 week ones. cause it'll still be a waste if they could last longer and i just threw them away.
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Old 08-27-2010, 09:45 AM
Beckifera Beckifera is offline
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Originally Posted by Knotlob View Post
I think that longer term disposables are always cheaper than Daily Disposables, even after factoring in the solutions.

I think you are somewhat adrift in the 1 Day Acuvue TruEye pricing.

I make it about $45/month, not $100, ignoring any rebate.

i.e. 90 lens box costs $68. So 60 lenses (one month supply for two eyes) will cost $68*60/90 = $45.30.

Of course you would need two boxes if your eye prescriptions were different but over a year that works out at $45/month.

knotlob
Like any good Lens 101 member, I saw this post and checked Lens.com. I saw that they are selling 1 Day Acuvue TruEye contact lenses for $67.95 per 90-lens box. Two boxes (one for each eye) would last for 90 days, correct? So a month's supply would be about 1/3 of that total (67.95x2=135.90) or about $45, like you said.

I think I have about the same confidence in my calculations as Sevateem1 does.

Your way was much simpler. Must be that European efficiency.

That or my American inefficiency.
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Old 08-28-2010, 12:21 PM
texasbrian texasbrian is offline
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Going back to how long TruEye can be worn, my optometrist told me very specifically that Vistakon let him know that TruEye has a film on it that enhances comfort. That film dissolves over time, and after about eight hours, it's gone. So it's a good thing/bad thing. Good: Makes it a great product to wear. Bad: It's J&J's way to make sure you don't get more than a day's worth out of the lens without suffering a bit.

Now, none of that has been confirmed... just what my doc told me.
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Old 08-28-2010, 02:13 PM
autumn_leaf autumn_leaf is offline
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Originally Posted by texasbrian View Post
Going back to how long TruEye can be worn, my optometrist told me very specifically that Vistakon let him know that TruEye has a film on it that enhances comfort. That film dissolves over time, and after about eight hours, it's gone. So it's a good thing/bad thing. Good: Makes it a great product to wear. Bad: It's J&J's way to make sure you don't get more than a day's worth out of the lens without suffering a bit.

Now, none of that has been confirmed... just what my doc told me.
i just threw out my trueyes this morning cause one fell in the sink...sucks cause i just used new solution, Aquify, on it last night. got my left one it and it felt great compared to Opti-free Replenish.

thanks for the info, haven't heard of the 8hr thing before. you would think they would publicize it more, but 8 hrs seems too short since people prolly wear them for 1 full day about 12-14 hrs. so they would have to suffer for 4+ hrs even if they were disposing it once a day???

as for myself, i wore it for 3 days with ~5 hrs each day. it did seem to be itchier and dried out faster the 3rd day, but switching to aqufiy, when i put it in it felt like a brand new lens. was really hoping to give it a go. comfort brand new though is the same as oasys in my opinion. dries out my eye in about 5 hrs which is normal. the new one today i wore for 5 hrs and started to be itchy at that time, prolly need to buy some eye drops.
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Old 08-28-2010, 02:24 PM
texasbrian texasbrian is offline
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*IF* the 8-hour film is true, then they wouldn't publicize it, because it would be adverse marketing... the comfort wears off? No... they just want you to put in a new pair ASAP... more pairs = more $$$

However, I can say mine feel great, film or no film. I haven't used solution, although I have Opti-Free Replenish left over from my Oasys days, and some Aquify (disinfects in five minutes!) if needed.
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Old 08-28-2010, 02:31 PM
autumn_leaf autumn_leaf is offline
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Originally Posted by texasbrian View Post
*IF* the 8-hour film is true, then they wouldn't publicize it, because it would be adverse marketing... the comfort wears off? No... they just want you to put in a new pair ASAP... more pairs = more $$$
yea, that's what i would think too, but then, why disclose that information to the doctor at all then?
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Old 08-28-2010, 02:37 PM
texasbrian texasbrian is offline
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Good question... hmmm... I don't know... I've been going to him for years, so maybe he just told me and wasn't supposed to? Maybe the Vistakon rep was excited? Could just be a word of advice to the doctor for how to prescribe them.
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Old 08-29-2010, 05:00 PM
xxxxx1 xxxxx1 is offline
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Originally Posted by texasbrian View Post
Going back to how long TruEye can be worn, my optometrist told me very specifically that Vistakon let him know that TruEye has a film on it that enhances comfort. That film dissolves over time, and after about eight hours, it's gone.
This seems unlikely. Vistakon patents say their lenses use integral wetting agents in the polymer mix, not a surface treatment.

In the interests of Science, I opened up a bottle of Clear Care myself. 12 hours the first two days, 10 hours for two more. Terminated the experiment after four days. Still comfortable, checked lids & lenses, nothing suspicious.

The economics don't work unless you set the reuse risk premium at $0, but could come in handy if you run out while traveling.

Last edited by xxxxx1; 08-30-2010 at 08:29 PM..
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  #58  
Old 08-30-2010, 09:29 AM
mamcita mamcita is offline
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Originally Posted by autumn_leaf View Post
as for myself, i wore it for 3 days with ~5 hrs each day. it did seem to be itchier and dried out faster the 3rd day, but switching to aqufiy, when i put it in it felt like a brand new lens. was really hoping to give it a go. comfort brand new though is the same as oasys in my opinion. dries out my eye in about 5 hrs which is normal. the new one today i wore for 5 hrs and started to be itchy at that time, prolly need to buy some eye drops.
What's this I'm reading about wearing 1-Day Acuvue TruEye contacts for 3 days? Doesn't the name 1-DAY Acuvue TruEye give you a clue as to how long these lenses should be worn?

I hope you don't do this on a regular basis. I'm not trying to be nasty or anything, I just don't want anything bad to happen to you that you can prevent. Follow your doctor's instructions if you don't want to do what the box says. Ask him or her if it's okay to wear these 5 hours a day for 3 days. He/she might just give you the green light, and if so, great. If not, listen to the professional who will examine your eyes and hopefully find them healthy.
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Old 08-30-2010, 02:34 PM
Knotlob Knotlob is offline
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Originally Posted by mamcita View Post
What's this I'm reading about wearing 1-Day Acuvue TruEye contacts for 3 days? Doesn't the name 1-DAY Acuvue TruEye give you a clue as to how long these lenses should be worn?

I hope you don't do this on a regular basis. I'm not trying to be nasty or anything, I just don't want anything bad to happen to you that you can prevent. Follow your doctor's instructions if you don't want to do what the box says. Ask him or her if it's okay to wear these 5 hours a day for 3 days. He/she might just give you the green light, and if so, great. If not, listen to the professional who will examine your eyes and hopefully find them healthy.
David/Autumn_Leaf's logic is explained in post #36. There is some tacit agreement implied by his doctor on wearing the 1 Day Acuvue TruEye lenses more than one day, plus references to some legal disputes that J&J had with other Acuvue lenses earlier.

knotlob
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  #60  
Old 08-31-2010, 04:24 PM
Sk8erBoi Sk8erBoi is offline
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Originally Posted by Knotlob View Post
David/Autumn_Leaf's logic is explained in post #36. There is some tacit agreement implied by his doctor on wearing the 1 Day Acuvue TruEye lenses more than one day, plus references to some legal disputes that J&J had with other Acuvue lenses earlier.

knotlob
You are correct, Knotlob. From post #36: "3. my doctor told me that if i wanted to wear the trueye contacts for more than one day that i should take regular care of them, but if they ever start to bother me to throw them out, which is what i would have done anyways. she did not see any harm from wearing them 2-3 days instead of just daily. "

So, it's true. Autumn_Leaf got permission from his/her eye care professional to wear the TruEye contacts for up to three days.
Your eye doctor knows you best, so follow his/her instructions, and don't start wearing your 1-Day Acuvue TruEyes contacts for three days just because Autumn_Leaf can, all right?
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  #61  
Old 10-19-2010, 10:30 AM
Jurassicmark Jurassicmark is offline
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Originally Posted by Knotlob View Post
is it only US Contact Lens wearers that abuse their Daily Disposable lenses .

knotlob
That's a good question knotlob. Is there any way to tell if European contact lens wearers follow wearing instructions better than American contact lens wearers? Have any studies been done?
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  #62  
Old 10-19-2010, 01:43 PM
Aaroncablemom Aaroncablemom is offline
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Originally Posted by Knotlob View Post
I think if you want to wear a lens longer, then go for a one or two week or even a Monthly Disposable lens.

knotlob
Well, yeah. If you want to wear contact lenses longer than one day, buy some that were designed for that.
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Old 10-19-2010, 02:08 PM
Goliath2001 Goliath2001 is offline
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(S)he is probably thinking back to when daily and monthly lenses were identical except for the name on the box.
Really? When was this? What brands were sold as both daily and monthly?
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Old 10-19-2010, 04:04 PM
Knotlob Knotlob is offline
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Really? When was this? What brands were sold as both daily and monthly?
Probably refers to the Bausch & Lomb case where B&L packaged identical lenses in different packaging and sold the same lenses at different prices. They settled out of court for big money.

There is a thread on this forum about it.

http://www.rand.org/pubs/monograph_reports/MR969/MR969.ch5.pdf

Bausch & Lomb SofLens Daily and SofLens59 (Monthly disposable) are made of the same material (hilafilcon B), but the monthly lens is a little thicker in the middle to withstand more mechanical handling.

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Old 10-19-2010, 06:10 PM
Contact Lens Fitter Contact Lens Fitter is offline
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Originally Posted by Knotlob View Post
Probably refers to the Bausch & Lomb case where B&L packaged identical lenses in different packaging and sold the same lenses at different prices. They settled out of court for big money.

There is a thread on this forum about it.

http://www.rand.org/pubs/monograph_reports/MR969/MR969.ch5.pdf

Bausch & Lomb SofLens Daily and SofLens59 (Monthly disposable) are made of the same material (hilafilcon B), but the monthly lens is a little thicker in the middle to withstand more mechanical handling.

knotlob
J&J as well as B&L had law suits over the same kind of thing. The payout sounds like big money, but it was not payed out in money. It was payed out in lenses to customers who felt they were deceived, then written off as advertising and promotional goods on their taxes.
Silicone gel lenses (except Biofinity) are usually fit 'tight' as recommended by the manufacturer, because they are stiff. This often leads to 'symptoms of hypoxia' because they is far more to worry about than dk or dk/l.
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Old 10-20-2010, 02:55 AM
Knotlob Knotlob is offline
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Originally Posted by Contact Lens Fitter View Post
J&J as well as B&L had law suits over the same kind of thing. The payout sounds like big money, but it was not payed out in money. It was payed out in lenses to customers who felt they were deceived, then written off as advertising and promotional goods on their taxes.
Silicone gel lenses (except Biofinity) are usually fit 'tight' as recommended by the manufacturer, because they are stiff. This often leads to 'symptoms of hypoxia' because they is far more to worry about than dk or dk/l.
Thanks Contact lens Fitter. I guess these Lens Companies have smart lawyers who managed to get agreement to supply in kind, at a fraction of the cost of supplying retail price for the lens compensation!

I am interested in your comment on silicone hydrogel lenses. I know that silicone hydrogel lens materials generally have a higher modulus/are less flexible. I have only worn Biofinity lenses (in silicone hydrogel) and found them very comfortable. I thought they actually felt like Daily Disposables in handling - i.e. a tendency to fold in on themselves on the finger if I added a drop or two of lens solution onto the lens before insertion.

So, is the modulus of the Biofinity much lower than the general silicone hydrogel lens materials?

When you say symptoms of hypoxia, were these real hypoxia conditions, or something else? I understand your point that high Dk or Dk/t is not the be all and end all, since this tends to be associated with high silicone content, which in turn tends to be less wettable/less comfortable without a lot of special surface treatment (plasma, etc).

knotlob
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  #67  
Old 10-20-2010, 08:53 AM
nakedeyes nakedeyes is offline
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Originally Posted by Contact Lens Fitter View Post
J&J as well as B&L had law suits over the same kind of thing. The payout sounds like big money, but it was not payed out in money. It was payed out in lenses to customers who felt they were deceived, then written off as advertising and promotional goods on their taxes.
Silicone gel lenses (except Biofinity) are usually fit 'tight' as recommended by the manufacturer, because they are stiff. This often leads to 'symptoms of hypoxia' because they is far more to worry about than dk or dk/l.
Well, now that the dust has settled in the courtrooms, can we be reasonably sure that when the box says "monthly" on it that there aren't daily contact lenses inside?
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Old 10-20-2010, 11:15 AM
Knotlob Knotlob is offline
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Well, now that the dust has settled in the courtrooms, can we be reasonably sure that when the box says "monthly" on it that there aren't daily contact lenses inside?
Sometimes it seems to depend on which country the lenses are being sold in. They could be rated monthly in places like India and China (and even sometimes in Europe), but be rated as 2 weekly or weekly in the US.

knotlob
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Old 10-20-2010, 11:50 AM
Delta88 Delta88 is offline
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Sometimes it seems to depend on which country the lenses are being sold in. They could be rated monthly in places like India and China (and even sometimes in Europe), but be rated as 2 weekly or weekly in the US.

knotlob
So the confusion continues.

I began to wonder why people don't just put the contact lenses in the right boxes, but then I remembered the reason why anything dumb and/or dangerous like that is done: there's money to be made. Ca-ching!
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Old 10-20-2010, 12:10 PM
Caligula Caligula is offline
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Well, now that the dust has settled in the courtrooms, can we be reasonably sure that when the box says "monthly" on it that there aren't daily contact lenses inside?
Think of it this way instead:

You may open a box of daily contact lenses and find monthly lenses instead.

In other words, the same lens can be approved as a daily lens or as a monthly lens.
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Old 10-20-2010, 01:29 PM
OV-102 OV-102 is offline
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Originally Posted by Caligula View Post
Think of it this way instead:

You may open a box of daily contact lenses and find monthly lenses instead.

In other words, the same lens can be approved as a daily lens or as a monthly lens.
How can that be? Aren't daily and monthly lenses supposed to be made of different materials?
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Old 10-20-2010, 01:48 PM
Knotlob Knotlob is offline
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How can that be? Aren't daily and monthly lenses supposed to be made of different materials?
In the Out of Court Settlement involving Bausch & Lomb, it was easier to have one product, which they could use to satisfy a number of different target markets (Daily, Weekly, Monthly). It was cheaper for them and they didn't have time to develop alternatives in the face of growing competition.

But at present Bausch & Lomb market a Daily Lens called Soflens Daily made of hilafilcon B.

They also market a Monthly lens - Soflens 59, made of hilafilcon B.

These lenses seem only to differ in packaging and the centre thickness of the lens. The Daily Lens is 0.09mm thick and the SofLens59 is 0.14mm thick at -3.00D. More or less the same lens. The monthly lens is a little thicker to better withstand the increased handling, but I have tested the Daily Lens and it is quite robust.

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  #73  
Old 10-20-2010, 05:55 PM
lurker2010 lurker2010 is offline
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How can that be? Aren't daily and monthly lenses supposed to be made of different materials?
No. Some companies file the same lens with the FDA for dispensing as daily disposable and as planned replacement. It's up to the practitioner to decide which is appropriate for the patient.

A lens which is approved for daily use might also be approved for planned replacement. It may be substantially the same as a lens which is approved for planned replacement. It might be nothing like a lens which is approved for planned replacement.

The fact that a lens is approved for daily use doesn't mean the lens can't be used longer.

I'm talking about daily use. Removing the lens at night. Properly cleaning and disinfecting the lens. I'm not talking about extended wear (leave the lens in your eyes overnight.)
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Old 11-04-2010, 10:23 PM
Karenza Karenza is offline
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I only just saw this. I recently travelled to the USA from Australia. During my travel I lost the suitcase that contained my stock of contact lenses, so went to an Optom locally to get new lenses. She got me a 30 day supply of Trueyes, and those were amaaaazingly comfortable and the comfort lasted throughout the day. I thought maybe the weather there was different and less dry than here and that perhaps that was the cause of the increased comfort. But came back here and the comfort continued, the lenses are so good that sometimes I forget them on at night when usually I can only cope with lenses for 10 hours max. So I sent her an email to tell her how I thought hers were better than mine for no apparent reason and she then explained that I was wearing Narafilcon B, which I have now been ordering online through my sister who lives in Seattle. Great lenses if you have dry eyes like I do. I can only wear daily disposables and have usually found that all of them were pretty much the same with regards to comfort and dryness until I got to try these. So I thought I''d share.
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Old 11-05-2010, 03:09 AM
Knotlob Knotlob is offline
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Originally Posted by Karenza View Post
I only just saw this. I recently travelled to the USA from Australia. During my travel I lost the suitcase that contained my stock of contact lenses, so went to an Optom locally to get new lenses. She got me a 30 day supply of Trueyes, and those were amaaaazingly comfortable and the comfort lasted throughout the day. I thought maybe the weather there was different and less dry than here and that perhaps that was the cause of the increased comfort. But came back here and the comfort continued, the lenses are so good that sometimes I forget them on at night when usually I can only cope with lenses for 10 hours max. So I sent her an email to tell her how I thought hers were better than mine for no apparent reason and she then explained that I was wearing Narafilcon B, which I have now been ordering online through my sister who lives in Seattle. Great lenses if you have dry eyes like I do. I can only wear daily disposables and have usually found that all of them were pretty much the same with regards to comfort and dryness until I got to try these. So I thought I''d share.
Hello Karenza and welcome to the forum.

We are always happy to hear first hand user opinions on lenses and any problems. So you think the US version (narafilcon B) is a more comfortable lens for people with dry eyes. That should be useful information to people with that problem.

knotlob
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  #76  
Old 11-05-2010, 09:40 AM
unclebuck unclebuck is offline
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Quote:
Originally Posted by Karenza View Post
I only just saw this. I recently travelled to the USA from Australia. During my travel I lost the suitcase that contained my stock of contact lenses, so went to an Optom locally to get new lenses. She got me a 30 day supply of Trueyes, and those were amaaaazingly comfortable and the comfort lasted throughout the day. I thought maybe the weather there was different and less dry than here and that perhaps that was the cause of the increased comfort. But came back here and the comfort continued, the lenses are so good that sometimes I forget them on at night when usually I can only cope with lenses for 10 hours max. So I sent her an email to tell her how I thought hers were better than mine for no apparent reason and she then explained that I was wearing Narafilcon B, which I have now been ordering online through my sister who lives in Seattle. Great lenses if you have dry eyes like I do. I can only wear daily disposables and have usually found that all of them were pretty much the same with regards to comfort and dryness until I got to try these. So I thought I''d share.
Thanks for sharing your story with us, Karenza. I'm glad you found a product that you really like.
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  #77  
Old 11-05-2010, 02:36 PM
xxxxx1 xxxxx1 is offline
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Quote:
Originally Posted by Karenza View Post
During my travel I lost the suitcase that contained my stock of contact lenses, so went to an Optom locally to get new lenses. She got me a 30 day supply of Trueyes.
Your story isn't entirely clear. Were your Australian contact lenses also TruEyes?


As an addendum, for the last few months I've been wearing the TruEyes (B) an average of 3 days per pair, removing nightly & cleaning with ClearCare. I just had a checkup by my very thorough OD, who pronounced everything OK. I suspect they may be sold as a weekly disposable in the future.
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  #78  
Old 11-05-2010, 04:21 PM
Nichobec Nichobec is offline
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Quote:
Originally Posted by xxxxx1 View Post
Your story isn't entirely clear. Were your Australian contact lenses also TruEyes?

As an addendum, for the last few months I've been wearing the TruEyes (B) an average of 3 days per pair, removing nightly & cleaning with ClearCare. I just had a checkup by my very thorough OD, who pronounced everything OK. I suspect they may be sold as a weekly disposable in the future.
Did your eye doctor tell you to wear your TruEye lenses for three days and clean them each night? These lenses are intended to be worn once and thrown away.

Please tell me you were following doctor's orders. The last thing Lens 101 members need is to get an infection or neovascularization because they read about The Guy Who Wears His Trueyes Contacts For Three Days And His Eye Doctor Says His Eyes Look Great.

I'm glad you're okay, but wearing 1-Day Acuvue TruEyes for more than 1-Day is not recommended.
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  #79  
Old 11-05-2010, 06:41 PM
Karenza Karenza is offline
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Quote:
Originally Posted by xxxxx1 View Post
Your story isn't entirely clear. Were your Australian contact lenses also TruEyes?


As an addendum, for the last few months I've been wearing the TruEyes (B) an average of 3 days per pair, removing nightly & cleaning with ClearCare. I just had a checkup by my very thorough OD, who pronounced everything OK. I suspect they may be sold as a weekly disposable in the future.
I was wearing TruEyes (Narafilcon A) the only one available in Australia to date. I only understood that there was a difference in the lenses across different countries when I noticed how much more comfortable the Narafilcon B lenses were and queried it. Of course this might not have the same effect on everyone. I am not certain if Dk is the reason. From what I understood that is just the oxygen transmission of the lens material. I am no scientist but how could that improve the dryness. Maybe it's the Hydraclear thing. I have been using Nara B for nearly 4 months now and am extremely happy with them, I forget they are on and can wear them until I go to sleep. This woud have been unheard of for me before. Prior to Trueyes (Nara A), I had used Ciba Dailies, Acuvue 1-day and Biomedics 1-Day. No great difference to the dryness and discomfort I experienced amongst any of those.
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  #80  
Old 11-05-2010, 07:45 PM
Karenza Karenza is offline
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Another thing worth a mention, in my pre Nara B days I used Blink Contacts ( a contact lens eye drop) a lot in the afternoons to help me prolong my lens wear. The difference comfort wise was marginal but that was the only way I managed to make 8-hours. I only do this now if I'm out late and start to become aware of the lenses.
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  #81  
Old 11-06-2010, 01:04 AM
xxxxx1 xxxxx1 is offline
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Quote:
Originally Posted by Karenza View Post
I was wearing TruEyes (Narafilcon A) ... I have been using Nara B for nearly 4 months now
Thanks for clearing that up, sounds like we've had a similar experience with A vs B.


Quote:
Originally Posted by Nichobec View Post
Did your eye doctor tell you to wear your TruEye lenses for three days and clean them each night? These lenses are intended to be worn once and thrown away.
His words were "I see no cause to suggest a change." Read this same thread for more detail on reuse.
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  #82  
Old 12-16-2010, 03:53 PM
Walkaway Walkaway is offline
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Quote:
Originally Posted by xxxxx1 View Post
Thanks for clearing that up, sounds like we've had a similar experience with A vs B.




His words were "I see no cause to suggest a change." Read this same thread for more detail on reuse.
Can you help me out here, xxxxx1? There are over 80 posts in this thread by now. Can you tell me which one has that information on re-using a one day lens?
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  #83  
Old 12-16-2010, 05:16 PM
Karenza Karenza is offline
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Default Re-using 1-day lenses

Quote:
Originally Posted by Walkaway View Post
Can you help me out here, xxxxx1? There are over 80 posts in this thread by now. Can you tell me which one has that information on re-using a one day lens?
I personally could not think of a worse thing to do. I have finally found lenses in Trueyes ( US version) that I can wear for 14+ hours. However I have an issue with dry-eyes, which means even with these, when I finally get them off, my eyes feel spent. The mere concept of re-using the same lenses makes me cringe, and that was my reason for switching to 1-day in the first place.
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  #84  
Old 12-16-2010, 05:35 PM
Slitheen Slitheen is offline
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Quote:
Originally Posted by Karenza View Post
I personally could not think of a worse thing to do. I have finally found lenses in Trueyes ( US version) that I can wear for 14+ hours. However I have an issue with dry-eyes, which means even with these, when I finally get them off, my eyes feel spent. The mere concept of re-using the same lenses makes me cringe, and that was my reason for switching to 1-day in the first place.
First of all, thanks for fearlessly adding to a thread that already has more than 80 posts.
Secondly, thank you for providing Lens 101 readers with a good reason why you shouldn't wear 1-day lenses for more than one day.

So do fresh new lenses make your eyes feel better?
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  #85  
Old 12-16-2010, 06:03 PM
Karenza Karenza is offline
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Default Re-wearing 1-day

Quote:
Originally Posted by Slitheen View Post
First of all, thanks for fearlessly adding to a thread that already has more than 80 posts.
Secondly, thank you for providing Lens 101 readers with a good reason why you shouldn't wear 1-day lenses for more than one day.

So do fresh new lenses make your eyes feel better?

Well I only read some of the threads. I just wanted to see if anyone else had this experience with Trueyes. The technical jargon can get out of hand and my optom does not believe that high oxygen lenses mean anything as far as comfort/dryness anyway. We had a lengthy discussion about this sometime after my early posts. He has patients wearing PureVision (which I tried ages ago... OUCH) who reduce their lens wear due to discomfort. It is a high oxygen one.
Re-wearing lenses for me just instinctively is a negative. Once I take the 1-day's out and give my eyes a rest of at least 8 hours, I am ready to wear lenses again and the new lenses start with a fresh feeling, more comfort and perhaps its my imagination but also more confidence.
Right now I'm still in the honeymoon phase with my newfound TruEyes, so sorry if I sound like a poster board. We will see how long this lasts.
Ok. I have to get back to work now and this is distracting me
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  #86  
Old 12-20-2010, 02:17 AM
ilove ilove is offline
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Hi everyone. Long time lurker, first time posting.
I've been following this forum carefully, especially the TruEye section, because I've recently started wearing contacts after 20 years of eye glasses.

I am posting to let you people know that here (in Canada) the TruEyes are narafilcon A's, unlike the US narafilcon B version. I think this revelation makes the situation even more intriguing. Why would J&J release different materials for US and Canada, even though they are both North American markets?

Anyways, for any of our American friends who would like to try narafilcon A's, ordering your contacts from Canada would be a very viable option. PM me if you would like to know a good online Canadian contacts seller (I'm not sure if I'm allowed to post the URL on these boards)

Since I have astigmatism in my left eye but only to a negligible extent in my right eye, I'm wearing Focus Dailies Toric in my left eye and TruEye in my right eye. Focus Dailies is a non-silicone hydrogel, and the difference really shows. My left eye gets tired a lot faster and I can definitely "feel" the contacts, whereas with the TruEye, for most of the day I don't even notice I'm wearing anything.
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  #87  
Old 12-20-2010, 05:14 AM
Knotlob Knotlob is offline
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Quote:
Originally Posted by ilove View Post
Hi everyone. Long time lurker, first time posting.
I've been following this forum carefully, especially the TruEye section, because I've recently started wearing contacts after 20 years of eye glasses.

I am posting to let you people know that here (in Canada) the TruEyes are narafilcon A's, unlike the US narafilcon B version. I think this revelation makes the situation even more intriguing. Why would J&J release different materials for US and Canada, even though they are both North American markets?

Anyways, for any of our American friends who would like to try narafilcon A's, ordering your contacts from Canada would be a very viable option. PM me if you would like to know a good online Canadian contacts seller (I'm not sure if I'm allowed to post the URL on these boards)

Since I have astigmatism in my left eye but only to a negligible extent in my right eye, I'm wearing Focus Dailies Toric in my left eye and TruEye in my right eye. Focus Dailies is a non-silicone hydrogel, and the difference really shows. My left eye gets tired a lot faster and I can definitely "feel" the contacts, whereas with the TruEye, for most of the day I don't even notice I'm wearing anything.
Hello ilove and welcome to the forum.

Interesting marketing differences between USA & Canada. Odd.

Thanks for posting.

knotlob
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  #88  
Old 12-20-2010, 10:07 AM
ElaineKramer ElaineKramer is offline
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Default Toric TruEyes?

Quote:
Originally Posted by ilove View Post
Hi everyone. Long time lurker, first time posting.
I've been following this forum carefully, especially the TruEye section, because I've recently started wearing contacts after 20 years of eye glasses.

I am posting to let you people know that here (in Canada) the TruEyes are narafilcon A's, unlike the US narafilcon B version. I think this revelation makes the situation even more intriguing. Why would J&J release different materials for US and Canada, even though they are both North American markets?

Anyways, for any of our American friends who would like to try narafilcon A's, ordering your contacts from Canada would be a very viable option. PM me if you would like to know a good online Canadian contacts seller (I'm not sure if I'm allowed to post the URL on these boards)

Since I have astigmatism in my left eye but only to a negligible extent in my right eye, I'm wearing Focus Dailies Toric in my left eye and TruEye in my right eye. Focus Dailies is a non-silicone hydrogel, and the difference really shows. My left eye gets tired a lot faster and I can definitely "feel" the contacts, whereas with the TruEye, for most of the day I don't even notice I'm wearing anything.
Hello there, ilove. Welcome to Lens 101.

I'm not sure how the Webmaster of this site will react to your offer. This forum is sponsored by Lens.com, and they may not let you direct their members to buy from someone else. You can understand that, can't you?

Anyway, I'm glad you like Lens 101, and I'm glad you like the TruEye lenses. There's a post on this site asking about a toric version of TruEyes.

http://www.lens101.com/1-day-acuvue-trueye/124291-lets-get-party-started.html#post164842
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  #89  
Old 03-02-2011, 03:54 PM
Moneyfornothin Moneyfornothin is offline
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Default

Quote:
Originally Posted by ilove View Post
Hi everyone. Long time lurker, first time posting.
I've been following this forum carefully, especially the TruEye section, because I've recently started wearing contacts after 20 years of eye glasses.

I am posting to let you people know that here (in Canada) the TruEyes are narafilcon A's, unlike the US narafilcon B version. I think this revelation makes the situation even more intriguing. Why would J&J release different materials for US and Canada, even though they are both North American markets?
Maybe for the same reason Canadians add a "u" to words like "labour." I think they just want to be different.
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  #90  
Old 03-02-2011, 05:37 PM
ilove ilove is offline
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Quote:
Originally Posted by Moneyfornothin View Post
Maybe for the same reason Canadians add a "u" to words like "labour." I think they just want to be different.
Funny, because the rest of the English-speaking world spells that word with the letter "u." Guess it's not us who tries hard to be different.
Imperial measurements anyone?
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  #91  
Old 03-03-2011, 11:48 AM
Aaroncablemom Aaroncablemom is offline
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Quote:
Originally Posted by ilove View Post
Funny, because the rest of the English-speaking world spells that word with the letter "u." Guess it's not us who tries hard to be different.
Imperial measurements anyone?
Hey now, let's not get uppity. Otherwise I'm taking my twelve inch ruler and my Fahrenheit thermometer and I'm going home.
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  #92  
Old 03-03-2011, 05:45 PM
nakedeyes nakedeyes is offline
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Default So There

Quote:
Originally Posted by Aaroncablemom View Post
Hey now, let's not get uppity. Otherwise I'm taking my twelve inch ruler and my Fahrenheit thermometer and I'm going home.
I bet you'll drive on the right side of the road as well.
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  #93  
Old 03-04-2011, 01:14 PM
ReTina ReTina is offline
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Default We're Like That

Quote:
Originally Posted by ilove View Post
Funny, because the rest of the English-speaking world spells that word with the letter "u." Guess it's not us who tries hard to be different.
Imperial measurements anyone?
Too many letters.

Yanks lk 2 mke evryting go fstr.

The space shuttle Endeavour, everybody .

Oo, Spell Check doesn't like it spelled like that.

Faster! Faster! Get rid of those burned out booster rockets! They're dead weight!
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  #94  
Old 03-25-2011, 05:20 PM
xxxxx1 xxxxx1 is offline
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Default A bit more data

Since my last post, Vistakon and Ciba Vision have entered results for some otherwise unpublished studies.

clinicaltrials.gov/ct2/results?term=narafilcon

As seen in my own n=1 experiment, narafilcon A in overnight wear seems safe:

clinicaltrials.gov/ct2/show/results/NCT00934102?term=narafilcon&rank=7&sect=X436015#ot hr

Ciba Vision looks to be preparing its own daily disposable silicone hydrogel, delefilcon A, probably for 2012:

clinicaltrials.gov/ct2/show/NCT01295905?term=narafilcon&rank=11


And there's been at least one more study not listed on clinicaltrials.gov:

"Study Shows Narafilcon B Elicits Comparable Ocular Response as the Highest DK/T Soft Lens, Non-Contact Lens Wear"

eyewiretoday.com/view.asp?20101209-study_shows_narafilcon_b_elicits_comparable_ocular _response_as_the_highest_dkt_soft_lens_non-contact_lens_wear



Still no new information on the narafilcon A vs. narafilcon B question.
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  #95  
Old 03-25-2011, 08:39 PM
redraidermommy redraidermommy is offline
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Lightbulb Thanks for the information

Thank you all for your valuable information.

I went to my annual eye appt. the day before yesterday, and she put in a 10-day trial of Acuvue TruEye contacts. I had been wearing the Acuvue Oasys Hydraclear Plus (extended wear) and they were comfortable at first, but in the last few months they made me want to rip my eyes out. They would get really cloudy/murkey, itchy, and my eyes were bloodshot. I suffer from allergies and chronic sinusitis, and I think those contacts irritated my eyes even more. I *think* my doctor said that Acuvue changed the lens material last year, which probably led to the reaction in my eyes when I wore them.

I have tried Proclears (the very first contact I ever wore) and hated them, and then wore the "Focus" Day and Night (or maybe it was Night and Day) for 7 years, however, my eyes became dry, cloudy/murky, and itchy toward the end of my 7 years wearing them, and thats when I was put in the Acuvue Oasys Hydraclear Plus. So, i've pretty much only worn extended wear contacts.

My dr. said due to my allergies I would do better in daily wear contacts. Of course (i'm sure the drug reps visited my dr recently), she put me into the TruEyes without really asking. I do need breathable contacts, otherwise I cannot wear them. I had no idea about the DK info. until I came across this forum when I was researching Trueyes. Anyhow, I have priced the Trueyes at several online sites, and OMG they are expensive! Anywhere between $395-435 a year!!!!!!!!!!!!!!

I just cannot see paying that much a year for contacts. I'm not even sure if I like the Trueyes...the first day I put them in after dilation and things were a lot clearer, even though my poor eyes stay dilated almost all day. They were by far the easiest contacts to put in, so soft, wet, and they slid right in with no problems. They were very comfortable too and easy to remove. Today, however, after about 4-5 hours I developed a migraine and my eyes felt very dry and almost tight feeling. I've used blink drops twice today and took 800 mg ibuprofin x2 today and my headache is finally gone. My eyes still feel tired though.

I'm a graduate student, so I spend a lot of time on the laptop researching, typing papers, ect., andf I need to be able to SEE!!!!! My R eye is -2.00 and my L eye is -2.50, and the dr gave me contacts for my R and L eye, whereas in the past, other doctors have written my Rx for both eyes as -2.00. I see a lot better now out of my left eye.

I have 8 more days on my trial so i'll pop in and let you all know how they feel. Oh, the dr. did say that if these don't work out, her 2nd reccomendation is the Air Optix Aqua contacts (I think they're monthly disposables). However, I want to try the biofinity but the dr doesn't want me wearing longer wear extended contacts.

Does anyone know if it's more expensive to buy contacts with one eye having a higher power than the other eye? I can't believe I've worn contacts this long and never knew about different material, DK info, water %, ect......I feel kind of dumb now

Thanks to those who actually read all of this! I didn't mean to talk your ears off! G'night

~Red
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  #96  
Old 04-02-2011, 03:34 AM
st2 st2 is offline
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Default

This is my first post.

My Optom recommended TrueEye (Narafilcon A) last year, I live in Asia. On the box, it says made in Ireland. On my first try, By 1-2 hrs it was getting a little drying on my eyes but bearable and finally, as the days go by; I got to wearing them through 8 hrs but it was not very comfortable. I'm comparing this with 1 day Acuvue Moist.

To redraidermommy and Mods
I've been wearing Acuvue Oasys for years, ever since it was out in the markets, it's very comfortable, 6 nights continous and new pair every week, I never had any problems, none so whatever, for all these years.

Recently, I've been having problems with the Oasys, about 5 hours of use, the lens felt a bit cloudy and smarting in the eyes.... there's more..... I'm posting this here as I read you mentioned about possibly Oasys material change.

If this is not appropriate here, perhaps we could continue this discussion in the Oasys thread? Kindly respond. Thanks.
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  #97  
Old 04-04-2011, 10:28 AM
Superschwin Superschwin is offline
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Default

Quote:
Originally Posted by st2 View Post
This is my first post.

My Optom recommended TrueEye (Narafilcon A) last year, I live in Asia. On the box, it says made in Ireland. On my first try, By 1-2 hrs it was getting a little drying on my eyes but bearable and finally, as the days go by; I got to wearing them through 8 hrs but it was not very comfortable. I'm comparing this with 1 day Acuvue Moist.

To redraidermommy and Mods
I've been wearing Acuvue Oasys for years, ever since it was out in the markets, it's very comfortable, 6 nights continous and new pair every week, I never had any problems, none so whatever, for all these years.

Recently, I've been having problems with the Oasys, about 5 hours of use, the lens felt a bit cloudy and smarting in the eyes.... there's more..... I'm posting this here as I read you mentioned about possibly Oasys material change.

If this is not appropriate here, perhaps we could continue this discussion in the Oasys thread? Kindly respond. Thanks.
I think the Oasys section would be better. I've already responded to your question there.
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  #98  
Old 01-15-2012, 06:31 PM
xxxxx1 xxxxx1 is offline
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Default Polymer Chemistry of Narafilcon A vs. Narafilcon B

The datasheets for Narafilcon A & Narafilcon B are finally available, showing us the precise changes.

MOLECULAR FORMULAE

NARAFILCON A: [C24H56O8Si5]w . [C16H26O7]v . [C6H10O3]z . [C6H9NO]y . [C5H9NO]x

NARAFILCON B: [C16H32O4Si[C2H6OSi]n]w . [C16H26O7]v . [C6H10O3]z . [C6H9NO]y . [C5H9NO]x



I'm going to start a new topic on the subject in this forum. Please post all replies there.
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  #99  
Old 01-16-2012, 10:31 AM
Ragnarox Ragnarox is offline
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Default

Quote:
Originally Posted by xxxxx1 View Post
The datasheets for Narafilcon A & Narafilcon B are finally available, showing us the precise changes.

MOLECULAR FORMULAE

NARAFILCON A: [C24H56O8Si5]w . [C16H26O7]v . [C6H10O3]z . [C6H9NO]y . [C5H9NO]x

NARAFILCON B: [C16H32O4Si[C2H6OSi]n]w . [C16H26O7]v . [C6H10O3]z . [C6H9NO]y . [C5H9NO]x



I'm going to start a new topic on the subject in this forum. Please post all replies there.
Have you got something us non-chemists can understand? I think that the majority of the people who come to this site are fairly intelligent, but don't have the education to know a polymer from a polecat. (That would describe me, anyway.)
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  #100  
Old 01-31-2012, 05:54 PM
Scienceguy Scienceguy is offline
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Quote:
Originally Posted by Ragnarox View Post
Have you got something us non-chemists can understand? I think that the majority of the people who come to this site are fairly intelligent, but don't have the education to know a polymer from a polecat. (That would describe me, anyway.)
I think you're right, Ragnarox. That's why this site is called "Lens 101." "101" for "beginner."
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