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  #1  
Old 03-12-2011, 10:08 AM
ashweb ashweb is offline
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Default Could I be allergic to silicone hydrogel?

Have always worn Vertex Toric by Coopervision with no problem. Read about silicone hydrogel lenses a year ago and wanted them for the increased oxygen they tout. Tried oaysis and they made my eyes bloodshot and a little sore, goopy as though infected. Went back to Vertex. A year goes by, I went for my annual exam, doc tells me about Biofinity and recommends them b/c of their hydrophilic properties. I wore them yesterday, and I had trouble getting them out last night. I've read the tip about wetting solution, so I can try that, but this morning I woke up with redness in the whites of one eye, which is how the oaysis problems started......am feeling leery of silicone hydrogel. OD tried to tell me last year that I was sensitive to my cleaner. This year I'm using the peroxide based cleaning system, so no preservatives....I wonder if the difficulty removing silicone hydrogels means that people injure their eyes or infect them while working to remove the lenses.

anyone experience the same redness, soreness, goop with silicone hydrogels?

Thanks in advance for any wisdom!

Ashley
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  #2  
Old 03-14-2011, 10:15 AM
Metsman Metsman is offline
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Default

Quote:
Originally Posted by ashweb View Post
Have always worn Vertex Toric by Coopervision with no problem. Read about silicone hydrogel lenses a year ago and wanted them for the increased oxygen they tout. Tried oaysis and they made my eyes bloodshot and a little sore, goopy as though infected. Went back to Vertex. A year goes by, I went for my annual exam, doc tells me about Biofinity and recommends them b/c of their hydrophilic properties. I wore them yesterday, and I had trouble getting them out last night. I've read the tip about wetting solution, so I can try that, but this morning I woke up with redness in the whites of one eye, which is how the oaysis problems started......am feeling leery of silicone hydrogel. OD tried to tell me last year that I was sensitive to my cleaner. This year I'm using the peroxide based cleaning system, so no preservatives....I wonder if the difficulty removing silicone hydrogels means that people injure their eyes or infect them while working to remove the lenses.

anyone experience the same redness, soreness, goop with silicone hydrogels?

Thanks in advance for any wisdom!

Ashley
Hi Ashley. Welcome to Lens 101.

I can't say I've experienced the same symptoms myself, but I've read about them here. Silicone hydrogels are very comfortable for many people, but they may take a little getting used to. It is possible that you are irritating your eyes when yo try to remove your contact lenses, but that's difficult for me to say without actually seeing your eyes. Just make sure your hands are clean when you insert and remove your contacts. Keep us posts and let us know how you feel in a few days and hopefully we can help you feel better.
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  #3  
Old 03-14-2011, 10:27 AM
ashweb ashweb is offline
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Default thank you -

Thanks so much, Metsman! I had better results this morning after wearing them for only 5 hours yesterday. I used saline to re-wet the lenses just before I removed them, and I was careful and methodical about my technique instead of getting frustrated and using a harsher and harsher "pinch" to get them out. They were still pretty difficult to remove compared to my old Vertex non-silicone-hydrogel lenses, but I had more success last night than the night before.

This morning, no extra redness or goop upon waking, and putting them in was easy as usual. I do use clear care for at least a year now. Last time I tried SiH lenses, I was using OptiFree.

I'll report back again!

Ashley
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  #4  
Old 03-14-2011, 11:00 AM
BigBanker1 BigBanker1 is offline
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Default

Quote:
Originally Posted by ashweb View Post
Thanks so much, Metsman! I had better results this morning after wearing them for only 5 hours yesterday. I used saline to re-wet the lenses just before I removed them, and I was careful and methodical about my technique instead of getting frustrated and using a harsher and harsher "pinch" to get them out. They were still pretty difficult to remove compared to my old Vertex non-silicone-hydrogel lenses, but I had more success last night than the night before.

This morning, no extra redness or goop upon waking, and putting them in was easy as usual. I do use clear care for at least a year now. Last time I tried SiH lenses, I was using OptiFree.

I'll report back again!

Ashley
I'm glad that Metsmen was encouraging to you and I'm glad things are working better for you. I think you found out an important principle: patience. Take your time handling your lenses and soon they'll get easier to handle.

Looking forward to your next report.
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  #5  
Old 03-16-2011, 07:45 AM
ashweb ashweb is offline
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Default 5-day report

Yesterday was Day 5 with Biofinity Toric, and my eyes are not irritated. Maybe it's the Clear Care, maybe it's the contact itself. I do notice that they feel more substantial, "boingy" and less sticky than the oasys. Got both contacts out last night with only two tries for each eye.

Noticed in my weights class at the gym that they stay in place better on my eyes than my old Vertex Torics. Vertex lenses shifted almost immediately and very easily when I lay down on my back or side.

Not sure yet, but it seems halos at night are reduced as well.

Ashley
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  #6  
Old 03-16-2011, 08:50 AM
Joeyrosschandler Joeyrosschandler is offline
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Default

Quote:
Originally Posted by ashweb View Post
Yesterday was Day 5 with Biofinity Toric, and my eyes are not irritated. Maybe it's the Clear Care, maybe it's the contact itself. I do notice that they feel more substantial, "boingy" and less sticky than the Oasys. Got both contacts out last night with only two tries for each eye.

Noticed in my weights class at the gym that they stay in place better on my eyes than my old Vertex Torics. Vertex lenses shifted almost immediately and very easily when I lay down on my back or side.

Not sure yet, but it seems halos at night are reduced as well.

Ashley
Good Ashley. I'm glad things are going better for you. It's nice to see the response you've gotten and even better to see that it's helping you.
So, have you gone to the Oasys and Vertex Toric sections of Lens 101 to see if you can answer some of the questions there? You'll get that warm, fuzzy feeling that comes from helping others.
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  #7  
Old 03-16-2011, 09:27 AM
ashweb ashweb is offline
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Default will do

Quote:
Originally Posted by Joeyrosschandler View Post
Good Ashley. I'm glad things are going better for you. It's nice to see the response you've gotten and even better to see that it's helping you.
So, have you gone to the Oasys and Vertex Toric sections of Lens 101 to see if you can answer some of the questions there? You'll get that warm, fuzzy feeling that comes from helping others.
Will do, Joeyrosschandler!
Ashley
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  #8  
Old 03-16-2011, 10:13 AM
Niner Niner is offline
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Default Looking Forward

Quote:
Originally Posted by ashweb View Post
Will do, Joeyrosschandler!
Ashley
Good job, JRC. Askley, I look forward to your contributions.
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  #9  
Old 03-16-2011, 10:42 AM
Deejayt Deejayt is offline
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Cool

Quote:
Originally Posted by ashweb View Post
Have always worn Vertex Toric by Coopervision with no problem. Read about silicone hydrogel lenses a year ago and wanted them for the increased oxygen they tout. Tried oaysis and they made my eyes bloodshot and a little sore, goopy as though infected. Went back to Vertex. A year goes by, I went for my annual exam, doc tells me about Biofinity and recommends them b/c of their hydrophilic properties. I wore them yesterday, and I had trouble getting them out last night. I've read the tip about wetting solution, so I can try that, but this morning I woke up with redness in the whites of one eye, which is how the oaysis problems started......am feeling leery of silicone hydrogel. OD tried to tell me last year that I was sensitive to my cleaner. This year I'm using the peroxide based cleaning system, so no preservatives....I wonder if the difficulty removing silicone hydrogels means that people injure their eyes or infect them while working to remove the lenses.

anyone experience the same redness, soreness, goop with silicone hydrogels?

Thanks in advance for any wisdom!

Ashley
Hey Ashley! That is very strange about the sore, redness and goop with Biofinity, I actaully used to wear them and just switched to TruEye. But Biofinity were the first lenses that I could actaully wear and feel comfortable in. I do remember the first few times it was hard to take them our though. I don't know why, I'm guessing it could have something to do with the material. Because they are Silicone Hydrogel. But anyway its good to hear that they are working out for you. What solution are you using now? I know that biopure works best for me, and before that I was using aquify. I tried the clear care but for some reason it made the lens feel dry and uncomfortable, so I would have to soak in aqufiy for a day after using clear care to add some moisture. Well, keep us posted! If you ever decide to go to a 1 day give TruEye a shot. Just got my trial today and so far they are more comfortable than biofinity. And i was suprised by that.
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  #10  
Old 03-16-2011, 10:58 AM
ashweb ashweb is offline
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Default

Quote:
Originally Posted by Deejayt View Post
Hey Ashley! That is very strange about the sore, redness and goop with Biofinity,
As it turns out, the Biofinity are great after 5 days....the first day I saw redness and worried that it would be a repeat of my experience with Oasys and Air Optix.

Thanks for the recommendation on the dailies. Wonder if they have Toric...

Ashley
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  #11  
Old 03-16-2011, 11:48 AM
Chelsee Chelsee is offline
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Default

Quote:
Originally Posted by ashweb View Post
As it turns out, the Biofinity are great after 5 days....the first day I saw redness and worried that it would be a repeat of my experience with Oasys and Air Optix.

Thanks for the recommendation on the dailies. Wonder if they have Toric...

Ashley
Hi Ashley,

I did a search on Lens.com but did not see any Acuvue TruEye Toric lenses, but keep your eyes peeled; they may be introducing them soon.
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  #12  
Old 04-29-2011, 10:52 AM
Metsman Metsman is offline
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Default

Quote:
Originally Posted by ashweb View Post
As it turns out, the Biofinity are great after 5 days....the first day I saw redness and worried that it would be a repeat of my experience with Oasys and Air Optix.

Thanks for the recommendation on the dailies. Wonder if they have Toric...

Ashley
Hi Ashley

Awesome, I'm glad you found something helpful here. Who was it that recommended these daily lenses to you?
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  #13  
Old 04-29-2011, 11:58 AM
ashweb ashweb is offline
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Default

Quote:
Originally Posted by Metsman View Post
Hi Ashley

Awesome, I'm glad you found something helpful here. Who was it that recommended these daily lenses to you?
Deejayt did...I think he (she?) recommended TrueEye dailies. Deejayt had used Biofinity and they were the first lenses he/she could wear comfortably, but now Deejayt uses dailies because he/she couldn't find an ideal storing/cleaning solution.
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  #14  
Old 04-29-2011, 01:34 PM
Zana Zana is offline
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Default

Quote:
Originally Posted by ashweb View Post
Deejayt did...I think he (she?) recommended TrueEye dailies. Deejayt had used Biofinity and they were the first lenses he/she could wear comfortably, but now Deejayt uses dailies because he/she couldn't find an ideal storing/cleaning solution.
Judging by the picture, Deejayt is definitely a "she."
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  #15  
Old 05-02-2011, 11:30 AM
Chelsee Chelsee is offline
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Default

Quote:
Originally Posted by ashweb View Post
Deejayt did...I think he (she?) recommended TrueEye dailies. Deejayt had used Biofinity and they were the first lenses he/she could wear comfortably, but now Deejayt uses dailies because he/she couldn't find an ideal storing/cleaning solution.
An online forum community at its best.
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  #16  
Old 06-06-2011, 07:34 AM
HydroRunner HydroRunner is offline
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Default Desinfecting and sometimes rubbing..

Quote:
Originally Posted by ashweb View Post
Deejayt did...I think he (she?) recommended TrueEye dailies. Deejayt had used Biofinity and they were the first lenses he/she could wear comfortably, but now Deejayt uses dailies because he/she couldn't find an ideal storing/cleaning solution.
Like DeejayT I also wasn't pleased with the storing/cleaning solution. I then combined rubbing with OptiClean and storing in one-step H2O2 (AOsept with self-neutralizing lens holder). So this still requires the use of two different fluids. But I do not have to rub them daily, just after a few days. (I do take them out every night, however!)

I does mean, of course, that the claim that the "oxygen bubbles" along with other things in AOsept would be sufficient to clean the lenses is false. Something must be building up after a few days because without rubbing they will become irritating.. (O, and mine are indeed Biofinity, incidently.)

Of course all this hassle does make the dailies attractive! I always keep some ProClear dailies at hand, especially when I'm traveling. And these TrueEye things might be even better. (But the Biofinities are least expensive and they have by far the best oygen flow.)

-- Jos
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  #17  
Old 06-06-2011, 08:57 AM
Logopolis Logopolis is offline
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Default

Quote:
Originally Posted by HydroRunner View Post
Like DeejayT I also wasn't pleased with the storing/cleaning solution. I then combined rubbing with OptiClean and storing in one-step H2O2 (AOsept with self-neutralizing lens holder). So this still requires the use of two different fluids. But I do not have to rub them daily, just after a few days. (I do take them out every night, however!)

I does mean, of course, that the claim that the "oxygen bubbles" along with other things in AOsept would be sufficient to clean the lenses is false. Something must be building up after a few days because without rubbing they will become irritating.. (O, and mine are indeed Biofinity, incidently.)

Of course all this hassle does make the dailies attractive! I always keep some ProClear dailies at hand, especially when I'm traveling. And these TrueEye things might be even better. (But the Biofinities are least expensive and they have by far the best oygen flow.)

-- Jos
Thanks for filling us in on your experience, HydroRunner. That's the best thing about this forum in my opinion. Experiences from real people.
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  #18  
Old 06-06-2011, 09:55 AM
Metsman Metsman is offline
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Default

Quote:
Originally Posted by ashweb View Post
Deejayt did...I think he (she?) recommended TrueEye dailies. Deejayt had used Biofinity and they were the first lenses he/she could wear comfortably, but now Deejayt uses dailies because he/she couldn't find an ideal storing/cleaning solution.
Cool. So someone here on Lens 101 helped you to find your contact lenses?
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  #19  
Old 06-22-2011, 10:02 AM
Niner Niner is offline
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Default Your Preference

Quote:
Originally Posted by HydroRunner View Post
Like DeejayT I also wasn't pleased with the storing/cleaning solution. I then combined rubbing with OptiClean and storing in one-step H2O2 (AOsept with self-neutralizing lens holder). So this still requires the use of two different fluids. But I do not have to rub them daily, just after a few days. (I do take them out every night, however!)

I does mean, of course, that the claim that the "oxygen bubbles" along with other things in AOsept would be sufficient to clean the lenses is false. Something must be building up after a few days because without rubbing they will become irritating.. (O, and mine are indeed Biofinity, incidently.)

Of course all this hassle does make the dailies attractive! I always keep some ProClear dailies at hand, especially when I'm traveling. And these TrueEye things might be even better. (But the Biofinities are least expensive and they have by far the best oygen flow.)

-- Jos
So you prefer the Biofinity lenses over ProClear Dailies, correct?
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  #20  
Old 06-22-2011, 11:37 AM
HydroRunner HydroRunner is offline
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Default Balance.. Bottom line..

Quote:
Originally Posted by Niner View Post
So you prefer the Biofinity lenses over ProClear Dailies, correct?
The balance:
Biofinity: Less expensive (fluids included)
Biofinity: Eyes seem to look slightly whiter (but I'm not absolutely sure..)
ProClear: Easier to use (dailies, so no fluids, no lensholder)
ProClear: Somewhat easier to shift aside (for teenage-grade nearby vision!)

So what's the bottom line? I almost exclusively wear Biofinity.
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  #21  
Old 06-22-2011, 11:44 AM
Joeyrosschandler Joeyrosschandler is offline
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Default

Quote:
Originally Posted by HydroRunner View Post
The balance:
Biofinity: Less expensive (fluids included)
Biofinity: Eyes seem to look slightly whiter (but I'm not absolutely sure..)
ProClear: Easier to use (dailies, so no fluids, no lensholder)
ProClear: Somewhat easier to shift aside (for teenage-grade nearby vision!)

So what's the bottom line? I almost exclusively wear Biofinity.
Okay, thanks for spelling it out for us. It looks like you prefer a less expensive brand of contact lenses over on that 's easier to use. I think maybe the Marketing Guys (and the Marketing Girl) will find that interesting.
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  #22  
Old 06-22-2011, 01:25 PM
Chelsee Chelsee is offline
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Quote:
Originally Posted by Joeyrosschandler View Post
Okay, thanks for spelling it out for us. It looks like you prefer a less expensive brand of contact lenses over on that 's easier to use. I think maybe the Marketing Guys (and the Marketing Girl) will find that interesting.
I'm glad you didn't leave out the Marketing Girl.
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  #23  
Old 06-22-2011, 04:42 PM
Zana Zana is offline
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Default

Quote:
Originally Posted by HydroRunner View Post
The balance:
Biofinity: Less expensive (fluids included)
Biofinity: Eyes seem to look slightly whiter (but I'm not absolutely sure..)
ProClear: Easier to use (dailies, so no fluids, no lensholder)
ProClear: Somewhat easier to shift aside (for teenage-grade nearby vision!)

So what's the bottom line? I almost exclusively wear Biofinity.
Maybe on that whiter eyes thing you can compare your eyes to a white piece of paper. If you're referring to veins, maybe you should take a picture.

Maybe if you're not as obsessive as me you can just be satisfied with being not absolutely sure.
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  #24  
Old 06-22-2011, 05:38 PM
HydroRunner HydroRunner is offline
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Quote:
Originally Posted by Zana View Post
Maybe if you're not as obsessive as me you can just be satisfied with being not absolutely sure.
Yeah, maybe! Im not sure..
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  #25  
Old 06-23-2011, 09:18 AM
Zoey Zoey is offline
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Default Decisions

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Originally Posted by HydroRunner View Post
Yeah, maybe! Im not sure..
Q: Do you ever have trouble making up your mind?

A: Yeah, sometimes . . . usually . . . . well, not all the time . . . most of the time . . . well, at least half of the time . . .

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  #26  
Old 07-12-2011, 04:06 PM
Zana Zana is offline
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Default I'm Not Sure I'm Sure

Quote:
Originally Posted by HydroRunner View Post
Yeah, maybe! Im not sure..
So you mean you're not sure that you can be satisfied with not be absolutely sure?
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  #27  
Old 07-13-2011, 05:19 PM
HydroRunner HydroRunner is offline
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Default Maybe

Quote:
Originally Posted by Zana View Post
So you mean you're not sure that you can be satisfied with not be absolutely sure?
No, it was about the eyes looking whiter! (See post #20). If the lenses are clean and not too old it seems to be so, but without rub-cleaning now and then this does not last, i.e. only soaking in H2O2 every night seems to be not good enough. (It seems so, I'm not absolutely certain, mind you!)

And even with rub-cleaning every 2 or 3 days, at the end of a month I think I see and feel the improvement with a pair of new lenses. (But I'm not 100% sure, did I say that already?)

Of course I could also replace them every 3 weeks, or 2 weeks which would still be cheaper than using dailies. Perhaps I'll try that. (Just wondering.. Maybe..)
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  #28  
Old 07-14-2011, 09:30 AM
yournamehere yournamehere is offline
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Default Fyi

Quote:
Originally Posted by HydroRunner View Post
No, it was about the eyes looking whiter! (See post #20). If the lenses are clean and not too old it seems to be so, but without rub-cleaning now and then this does not last, i.e. only soaking in H2O2 every night seems to be not good enough. (It seems so, I'm not absolutely certain, mind you!)

And even with rub-cleaning every 2 or 3 days, at the end of a month I think I see and feel the improvement with a pair of new lenses. (But I'm not 100% sure, did I say that already?)

Of course I could also replace them every 3 weeks, or 2 weeks which would still be cheaper than using dailies. Perhaps I'll try that. (Just wondering.. Maybe..)
Just so you know, HydroRunner. You can go ahead and say your lenses felt better with a daily cleaning even if you're not 100% sure.
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  #29  
Old 07-21-2011, 04:19 PM
Zana Zana is offline
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Default Keeping Score

Quote:
Originally Posted by HydroRunner View Post
No, it was about the eyes looking whiter! (See post #20). If the lenses are clean and not too old it seems to be so, but without rub-cleaning now and then this does not last, i.e. only soaking in H2O2 every night seems to be not good enough. (It seems so, I'm not absolutely certain, mind you!)

And even with rub-cleaning every 2 or 3 days, at the end of a month I think I see and feel the improvement with a pair of new lenses. (But I'm not 100% sure, did I say that already?)

Of course I could also replace them every 3 weeks, or 2 weeks which would still be cheaper than using dailies. Perhaps I'll try that. (Just wondering.. Maybe..)
So if you're not sure if you noticed any improvement or not, why not just rub your lenses clean every, say, three days and see how you feel? Maybe you should take notes. Write down any feelings of soreness or itchiness or anything of that nature you might notice. You might want to give the pain or itch a score on a scale of 1-3 or something. Make it something simple so you can see the difference. If write down one day that your itch level is 6 and then the next day it's 8, it might not help as much as a 2 (kind of itchy) versus a 3 (really itchy). Do you think that would help?
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  #30  
Old 08-02-2011, 02:46 PM
Zoey Zoey is offline
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Quote:
Originally Posted by ashweb View Post
As it turns out, the Biofinity are great after 5 days....the first day I saw redness and worried that it would be a repeat of my experience with Oasys and Air Optix.

Thanks for the recommendation on the dailies. Wonder if they have Toric...

Ashley
Still no Acuvue TruEye Toric lenses available, as far as I can tell by Google Search.
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  #31  
Old 02-21-2012, 02:48 AM
Lensesagain Lensesagain is offline
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Just responding on the point about Silicon Hydrogel lenses as I found this interesting, having had similar experiences with many of these lenses, Acuvue included. Polymacon lenses seem a lot nicer to wear, i.e, Bausch and Lomb Soflens are one brand, there are plenty of non-Silicon Hydrogel lenses to try, please keep us posted on your situation.

http://www.straightfromthedoc.com/50226711/silicone_hydrogel_contact_lenses_senofilcona_acuvu e_oasysa_brand_contact_lenses_with_hydracleara_plu s_alleviate_computer_vision_syndrome.php
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  #32  
Old 02-22-2012, 09:24 AM
HydroRunner HydroRunner is offline
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Default It does matter (size..)

Quote:
Originally Posted by Lensesagain View Post
Just responding on the point about Silicon Hydrogel lenses as I found this interesting, having had similar experiences with many of these lenses, Acuvue included. Polymacon lenses seem a lot nicer to wear, i.e, Bausch and Lomb Soflens are one brand, there are plenty of non-Silicon Hydrogel lenses to try, please keep us posted on your situation.
Why on earth did you end with an advertisement link for Silicon Hydrogel lenses after that remark you made?!
Anyhow, you are right that the topic is interesting! I also tried many lenses of both the conventional type and the SH type. Conclusion: If they don't fit I cannot wear them, and there are only a few brands that fit. The main reason is that manufacturers until now refuse to make their lenses with different curvatures in small steps. Steps of 0.1 would be good enough, but now you often have to choose between, for instance, BC8.4 and BC8.8 with nothing in between!

This has very little to do with the difference between conventional and SH material. In fact if lenses fit, I feel hardly any difference. I'm equally satisfied with Proclear as with Biofinity (both in curvature 8.6). To be perfectly satisfied I want BC8.7 for my left eye and BC8.6 for the right. Then I have to use Proclear daily for left (because it comes in BC8.7 and Biofinity is always 8.6) Again, this has nothing to do with the fact that one is conventional and the other is SH.

Why don't they just make all the sizes in the range with step 0.1 ???!
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  #33  
Old 02-22-2012, 01:24 PM
Lensesagain Lensesagain is offline
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Quote:
Originally Posted by HydroRunner View Post
Why on earth did you end with an advertisement link for Silicon Hydrogel lenses after that remark you made?!
Anyhow, you are right that the topic is interesting! I also tried many lenses of both the conventional type and the SH type. Conclusion: If they don't fit I cannot wear them, and there are only a few brands that fit. The main reason is that manufacturers until now refuse to make their lenses with different curvatures in small steps. Steps of 0.1 would be good enough, but now you often have to choose between, for instance, BC8.4 and BC8.8 with nothing in between!

This has very little to do with the difference between conventional and SH material. In fact if lenses fit, I feel hardly any difference. I'm equally satisfied with Proclear as with Biofinity (both in curvature 8.6). To be perfectly satisfied I want BC8.7 for my left eye and BC8.6 for the right. Then I have to use Proclear daily for left (because it comes in BC8.7 and Biofinity is always 8.6) Again, this has nothing to do with the fact that one is conventional and the other is SH.

Why don't they just make all the sizes in the range with step 0.1 ???!
I was not aware that an advertisement appeared - I do not see an advert when I read on my phone, only articles about issues with SiHy lenses.

I would need to check the link on a PC when time permits, to understand what you say you saw - but I will certainly clarify that it was not my intention to post an advert - quite the contrary, information should have appeared, from a Doctor and his replies.

How do you find the Proclear lenses comfort wise? Why do you require different base curves for both your eyes?
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  #34  
Old 02-22-2012, 04:24 PM
HydroRunner HydroRunner is offline
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Originally Posted by Lensesagain View Post
How do you find the Proclear lenses comfort wise? Why do you require different base curves for both your eyes?
Comfort wise:
1) In the old days (1970s, 1980s) I didn't wear lenses every day. They didn't always feel comfortale. Also, I would usually remove the lenses long before going to sleep and wear glasses a few hours at the end of the day.
2) In the 1990s, the very thin Acuvue I lenses gave an improvement, but still there were times when they felt a bit irritating.
3) Now, in the new century, It is no problem wearing lenses 16 hours a day on consecutive days. Proclear and Biofinity are both comfortable enough for that, Proclear has the extra comfort that it never needs additional cleaning (just peroxide storage every day is enough for the one-month lenses!) Biofinity needs rub-cleaning every few days (or else they get itchy..)

Base curves:
8.6 gives slightly better vision in my right eye, which has a slight astigmatism (about 0.5). BC8.7 moves a bit more and seems to make it worse, while the tighter fit with BC8.6 seems to correct it somewhat..
The other eye has no astigmatism at all, but it needs a stronger lens (-3.25 instead of -2.25) so the lens is a bit thicker. This may explain why the tighter fit feels less comfortable there, while in the right eye it feels fine. But it could also be the actual shape of the eye..
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  #35  
Old 06-13-2013, 12:04 PM
klynn klynn is offline
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Default Allergies to Hydrogel - Useful Information (esp re pros/cons)

I used to wear cibasoft colors 1-2 weeks before they discontinued. Wore them for 15 years and the recommended switch was ciba monthly. They gave me red eye around the iris and if I wore them longer than a few hours, it would spread to the entire whites of my eye. They recommended Acuvues, and then Air Optix. Same problem in varying degrees, within hours. One even burned going in. 20 years, not a single problem with contacts until this.

It was even suggested that it was my eyes and couldn't wear contacts anymore, but based on the discussion above and my personal experience, I know this isn't true. Pulled out a pair of colored Fresh Looks and although I hate how they cloud my vision and their lack of comfort, no red eye.

I think it's something to do with the hydrogel. I called the manufacturer and they said it's made of the same material as the discontinued version. I get red eye from them, so my conclusion is that it's something to do with the hydrogel. Hydrogel is supposed to attract water right? Maybe it pulls it right out of your eye? I don't know. All I'm saying is for me, they suck and I wish they'd bring the old contact back. Meanwhile, I'm off to a new manufacturer since Ciba Vision (who's now merged with another company and can be contacted under Alcon), could not help much with telling me why the new contacts cause problems over the old versions.

I found the below information and thought if anyone's still researching, it's probably useful info for making considerations:

I. Definition-A hydrogel contact lens is a type of flexible lens which is made from plastic and water. The lens will conform to the shape of the cornea, can be folded so that the edges meet and when released, will return to its normal shape (i.e., excellent memory). Also called a soft contact lens

II. Advantages & Disadvantages

A. Advantages
1. "Initial" Comfort
2. Visual acuity or comfort affected little by lens movement
3. Simple to fit
4. May inventory
5. Little adaptation
6. Occasional wear possible
7. Little chance of dislodging the lens
8. Chance of trapped foreign body or abrasion small
9. Rarely causes photophobia or excessive tearing
10. Cosmesis
11. Minimal spectacle blur

B. Disadvantages
1. Bacterial contamination and infection
2. Increased solutions/complexity and solution cost
3. Increased care time
4. Durability
5. Greater risks with noncompliance
6. Prone to deposits/GPC
7. Reduced oxygen permeability (corneal edema)
8. Quality of vision may be reduced from a couple of letters to a line on Snellen chart & reduced CSF
9. Difficult to verify
10. Limitations of correction

III. Properties

A. Material
1. Consists of chemical monomers, linked together to form chains of polymers which are linked by cross-linking units. With few cross-linking molecules, the polymer may absorb a solvent; in this case water.
2. Original hydrogel contact lenses made of polyHEMA (2-hydroxy-ethyl methacrylate) crosslinked with ethylene glycol dimethacrylate (EDMA).
3. Attempts to improve the properties have resulted in using polyHEMA; but, in addition, using other monomers such as NVP (n vinyl pyrollidone), to improve properties such as water content, strength or resistance to deposits.
4. Lenses may also be made of different polymers which are related to HEMA.

B. Water Content
1. Water content = weight of water in lens X 100 /total weight of lens
2. Range of water content 38-79%
3. HEMA by itself produces a water content of 38%.
4. Monomers used in the copolymers are hydrophilic or hydrophobic.

a. Hydrophilic monomers (Listed in greatest to lowest ability to increase water content): MAA (methacrylic acid), NVP, HEMA

1) Increase water content
2) Decrease lens modulus (strength)
3) Decrease lens elasticity

b. Hydrophobic monomers: MMA (methylmethacrylate), isobutyl methacrylate, pentyl methacrylate

1) Decrease water content
2) Increase lens modulus
3) Increase lens elasticity

5. Water content plays a role in determining:

a. Pore size
b. Ability to regain shape after blink
c. Strength
d. Elasticity
e. Oxygen transmissibility
g. Adsorption of tear solutes

6. FDA recommended hydrogel class system (Useful for identifying lens physical properties & response to various solutions)

a. Group 1 - nonionic polymers, low water (polyHEMA & hydrophobic monomers, no MAA)
b. Group 2 - nonionic polymers, high water (poly NVP & hydrophilic monomers, no MAA)
c. Group 3 - ionic polymers, low water (MAA)
d. Group 4 - ionic polymers, high water (poly HEMA & hydrophilic monomers & increased levels of MAA, no NVP)
e. Bottom line: Groups 2 & 4 avoid heat disinfection, sorbic acid, potassium sorbate, extended time in papain enzyme and patients with deposit problems; Group 1 has greatest resistance to protein deposits and Group 4 the lowest.

FDA Groups:
Group 1 Group 2 Group 3 Group 4
tefilcon lidofilcon B etafilcon bufilcon A
tetrafilcon A surfilcon bufilcon A perfilcon
crofilcon lidofilcon A deltafilcon A etafilcon A
dimefilcon ofilcon A droxifilcon A ocufilcon B
hefilcon A & B xylofilcon A phemfilcon A phemfilcon A
phemfilcon A scafilcon A ocufilcon tetrafilcon B
isofilcon methafilcon mafilcon vifilcon A
polymacon


Reference: Stone RP. Why Contact Lens Groups? Contact Lens Spectrum 1988; 3(12): 38-41.

C. Oxygen Permeability = Dk Transmission = Dk/thickness
1. Oxygen permeability increases logarithmically with an increase in water content.
2. Oxygen Transmission increased by decreasing center thickness.
3. Dk values for daily wear hydrogel lenses range from 8.3 to 18.8.
4. Dk values for extended wear hydrogel lenses range from 8.4 to 38.9. This does not take into account oxygen transmission.
5. A thicker high water content lens can have an equal oxygen transmission as a thin low water content lens.
6. Tear exchange behind a hydrogel contact lens is only 1-2% of the tear volume per blink compared to 10-20% for RGP’s so oxygen must be obtained by transmission.

E. Deposit Resistance
1. Crofilcon A- (PBH/WJ - CSI Clarity DW, CSI Clarity FW & CSI Clarity toric) - This material has been found to be more deposit resistant than other materials. It is nonHEMA, {GMA/MMA (glycerol methacrylate)}.
2. Planned Replacement - Replacement of lenses at regular intervals such as weekly, bi-weekly, monthly, bi-monthly or quarterly.
a. Frequent Replacement: a. Optima FW Medalist, Gold Medalist Toric, Occasions Multifocals - Bausch & Lomb
b. Focus, Focus Toric, Focus Softcolors - Ciba Vision
c. Preference DW/FW or Preference Std., Preference Toric, Frequency 55 & 38, Hydrasoft, Frequency 55 Toric, Hydrasoft Toric - Coopervision
d. Hydron Proactive 55 & Edge III Proactive DW - Ocular Sciences
e. Surevue, Vistavue - Vistakon
f. Gentle Touch DW/FW - WJ
g. Multiples, Multiples Toric, Additions - Sunsoft
h. Proclear, Proclear Compatibles - Biocompatibles
i. Specialty T-FRP, Specialty Progressive - Specialty Ultravision
j. Flexlens, Flexlens Toric - Flexlens (Paragon)
k. Misc. companies:Accugel (Sph & Toric), Metro Optics (Satureyes), California Optics (COSoft Toric), Blanchard (Quattro), Lifestyle (XTRA), Unilens (E.M.A.), World Optics (ABerCon)

3. Disposable lenses
a. Acuvue, 1 day Acuvue, Acuvue 2, Acuvue Bifocal - Vistakon
b. Focus 1-2 wk., Focus 1-2 wk. Softcolors, Focus Dailies - Ciba Vision
c. Seequence, Optima FW, Soflens 66, Soflens 66 Toric, Soflens One Day - Bausch & Lomb d. Hydron Biomedics 38 & 55 - Ocular Sciences
e. Fresh Look, Fresh Look Colors, Fresh Look Color Enhancers, Fresh Look Toric, Fresh Look Color Blends. Precision UV - WJ
f. Specialty Choice A.B. - Specialty Ultravision

4. New Hydrogel Hybrids
a. Pure Vision-Bausch & Lomb
b. Focus Night and Day -Ciba

F. Wettability
1. Aids in lid closure and comfort
2. Contaminants adhere to surface
3. Increased sensitivity to preservatives

IV. Lens Types

A. Daily Wear
1. Probably the most popular lens available
2. Worn daily, generally 12-14 hours; however, can be worn occasionally or for shorter periods of time.
3. Disinfection systems include heat, chemical & oxidation.
4. Largest variety of torics and bifocals fall in this category

B. Flexible/Extended Wear
1. Lenses are worn continuously for 3-7 days or can be worn occasionally extended wear (i.e., flexible wear); for example, weekends.
2. Generally require chemical or oxidation disinfection.
3. Decreased selection of torics and bifocals

C. Planned Replacement (FRP & Disposables)
1. Disinfection
2. Wear time

D. Tints
1. Handling tints
a. Light blue tint added to lens to aid in handling of lens.
2. Color Enhancers/Transparent Tints
a. Used to enhance an eye color already present.
3. Opaque Tints
a. Can change eye color
b. Lenses available:
Durasoft 3 Complements (FW), Durasoft 3 Colors (FW), Durasoft 2 Colors (DW), Fresh Look Colors (FW) -WJ Illusions (DW) - Ciba Vision Natural Touch (DW) CooperVision

V. Lens Design

A. Lathe-cut
B. Cast-molded
C. Spun-cast
D. Lathe-cut back surface and Spun-cast front surface

VI. Factors to Consider in Material Selection

A. Patients with Ocular Compromise
B. Refractive Error
C. Deposit-Prone Patients
D. Dry Eye
E. PMMA/RGP Refits
F. Age
G. Part-time Wearers

VII. Lens Selection

A. Base Curve Radius
1. Typically available in 2-4 BCR
2. Some manufacturers assign sag or vault # (B&L - Sag I Flatter, Sag II Steeper)
3. 2 ways to fit
a. 4-5D flatter than flat or low K
b. Steepest BCR - K greater than 45D
c. Middle BCR - 41-45 D
d. Flat BCR - K less than 41D

B. Lens Diameter
1. HVID + 2 = Lens Diameter
2. Generally available in 13.8-15mm diameters

C. Power
1. Final power is based on predicted power and OR + diagnostic lens power
2. Predicted power
a. Vertex back to cornea Rx’s greater than + 4D
b. Spherical equivalent for patient’s with low amounts of spectacle cylinder.
c. Residual astigmatism = Refractive cylinder Residual corneal cylinder is not apparent as the hydrogel lens drapes cornea resulting in little to no tear lens.

D. Water Content
1. Low water content - less than 40% water
2. Medium water content - 50-60% water
3. High water content - greater than 60% water
4. Increasing water content increases oxygen permeability & decreases durability

E. Center Thickness
1. Center thickness of -3.00D lens will be approximately 0.08mm
2. Affects handling & oxygen transmission

umsl.edu/~bennette/hydromaterial.
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  #36  
Old 06-15-2013, 11:16 AM
luvbostonxo2's luvbostonxo2's is offline
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Quote:
Originally Posted by ashweb View Post
Have always worn Vertex Toric by Coopervision with no problem. Read about silicone hydrogel lenses a year ago and wanted them for the increased oxygen they tout. Tried oaysis and they made my eyes bloodshot and a little sore, goopy as though infected. Went back to Vertex. A year goes by, I went for my annual exam, doc tells me about Biofinity and recommends them b/c of their hydrophilic properties. I wore them yesterday, and I had trouble getting them out last night. I've read the tip about wetting solution, so I can try that, but this morning I woke up with redness in the whites of one eye, which is how the oaysis problems started......am feeling leery of silicone hydrogel. OD tried to tell me last year that I was sensitive to my cleaner. This year I'm using the peroxide based cleaning system, so no preservatives....I wonder if the difficulty removing silicone hydrogels means that people injure their eyes or infect them while working to remove the lenses.

anyone experience the same redness, soreness, goop with silicone hydrogels?

Thanks in advance for any wisdom!

Ashley
The behaviour of these materials is much different than the older hydrogel materials and can get coated with lipid deposits. I suspect you are reacting to the lipid deposits on lenses. Have your eye doc look at your eyes to see if this is the issue.
An allergy to silicone hydrogels is rare. If you have a latex allergy then perhaps but it's still very rare!

All of thes issues can be detected by your eye doc so def have them looked at and do not continue wearing lenses if your experiencing adverse reactions. A common eye issue brought on by any contact lens wear is gpc so def have your euye doc check out yer eyes!

Last edited by luvbostonxo2's; 07-23-2013 at 03:26 PM..
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  #37  
Old 06-15-2013, 11:42 AM
klynn klynn is offline
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Join Date: Jun 2013
Posts: 3
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Quote:
Originally Posted by luvbostonxo2's View Post
The behaviour of these materials is much different than the older hydrogel materials and can get coated with lipid deposits. I suspect you are reacting to the lipid deposits on lenses. Have your eye doc look at your eyes to see if this is the issue.
An allergy to silicone hydrogels is rare.

All of thes issues can be detected by your eye doc so def have them looked at and do not continue wearing lenses if your experiencing adverse reactions.
Thanks. Guess my doc didn't seem so aware as he's still guessing about what I could be reacting to. I ended up w/frequency 55 by cooper vision (now Equate my doc said) and so far, so good (day 2).
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  #38  
Old 06-15-2013, 03:16 PM
luvbostonxo2's luvbostonxo2's is offline
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Quote:
Originally Posted by klynn View Post
Thanks. Guess my doc didn't seem so aware as he's still guessing about what I could be reacting to. I ended up w/frequency 55 by cooper vision (now Equate my doc said) and so far, so good (day 2).
Frequency lenses are great, as they are made with a protein resistant material that will give good comfort morning to night!
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  #39  
Old 06-15-2013, 10:39 PM
klynn klynn is offline
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Join Date: Jun 2013
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Quote:
Originally Posted by luvbostonxo2's View Post
Frequency lenses are great, as they are made with a protein resistant material that will give good comfort morning to night!
So glad to hear that! All day today & no problems so looks like I've found a keeper!
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