Why Biofinity?

Georgiaonmymind · #1 (**permalink**) 07-11-2008, 03:53 PM

What made you decide to try and ultimately buy Biofinity contact lenses?

rfriel · #2 (**permalink**) 12-14-2009, 01:43 PM

biofinity are new and 3rd GEN SiHy, why not try them, higher oxygen transmission than O2optix or acvue oasys, lower modulus, same BC and DIA. and higher H2O content than any other lens with that high of Dk/T and that low of modulus, give'em a whirl and i'll report back my findings....... EH?

ForceBwitu · #3 (**permalink**) 12-14-2009, 02:28 PM

Quote:

Originally Posted by rfriel

biofinity are new and 3rd GEN SiHy, why not try them, higher oxygen transmission than O2optix or acvue oasys, lower modulus, same BC and DIA. and higher H2O content than any other lens with that high of Dk/T and that low of modulus, give 'em a whirl and I'll report back my findings....... EH?

You make several good points here. Let's check out the numbers you mentioned:

I happened to find a nice bar chart comparing the Dk (Oxygen transmission) and modulus (stiffness) of Focus Night & Day, Biofinity, Acuvue Oasys, O2 Optix, PureVision, Acuve Advance and Acuvue 2. As you can see, Biofinity compares quite well.

rfriel · #4 (**permalink**) 12-14-2009, 02:50 PM

Biofinity have the highest water content of any SiHy lens with that high of oxgen transmissiblity and that low of modulus too. plus the fact the material is a natrually wettable material with no surface treatment. FN&D are 1st GEN SiHy, high modulus, low H2O content and must have a surface treatment to make them wearable, FN&D are not eye friendly lenses, IMHO

Quote:

Originally Posted by ForceBwitu

You make several good points here. Let's check out the numbers you mentioned:

I happened to find a nice bar chart comparing the Dk (Oxygen transmission) and modulus (stiffness) of Focus Night & Day, Biofinity, Acuvue Oasys, O2 Optix, PureVision, Acuve Advance and Acuvue 2. As you can see, Biofinity compares quite well.

ForceBwitu · #5 (**permalink**) 12-14-2009, 03:04 PM

Quote:

Originally Posted by rfriel

Biofinity have the highest water content of any SiHy lens with that high of oxgen transmissiblity and that low of modulus too. plus the fact the material is a natrually wettable material with no surface treatment. FN&D are 1st GEN SiHy, high modulus, low H2O content and must have a surface treatment to make them wearable, FN&D are not eye friendly lenses, IMHO

It looks to me like Biofinity is probably more comfortable than Focus Night and Day, so why would anyone wear the latter?

rfriel · #6 (**permalink**) 12-14-2009, 03:14 PM

Very good question, Y FN&D at all?? But alas, comfort is in the "eye" of the beholder, arh,arh,arh, sorry, didn't mean make such a bad pun........

Quote:

Originally Posted by ForceBwitu

It looks to me like Biofinity is probably more comfortable than Focus Night and Day, so why would anyone wear the latter?

Purpleiris · #7 (**permalink**) 12-14-2009, 05:26 PM

Quote:

Originally Posted by rfriel

Very good question, Y FN&D at all?? But alas, comfort is in the "eye" of the beholder, arh,arh,arh, sorry, didn't mean make such a bad pun........

That's okay, rfiel. I've heard worse. Like this one, for example:

Q: What's a pirate's favorite store?

A: Toys Arrrrrrrrr Us

Simosa · #8 (**permalink**) 12-15-2009, 05:20 AM

Hey can anybody tell me whether Bioinfinity is good for dry eyes? I have been wearing the old 'focus day and nights' which were amazing (just 24 % water so good for dry eyes) but they discontinued that line and replaced with a bad lens called air optix. I see that Bioinfinity allows a lot of oxygen through like day and night but because it is 48% water content I was concerned about them drying out your eyes. Can people tell me about whether this is a suitable lens switch from focus day and night?

rfriel · #9 (**permalink**) 12-15-2009, 10:08 AM

FN&D with the high modulus, rough edges and surface treatment just were not mechanically eye friendly. they worked for some people but epithelial flaps and GPC were common.

Biofinity are a completely different type material than 1st/2nd genertion type lenses. high water content does not necessarily mean they will dry your eyes out, it depends on the how the surface of the lens interacts with the eye. If there is a question if there is something better for you, give Biofinity a try. it's not like your making a life long committment, and dont buy a year supply before trying a new lens material for a couple of months either.

Quote:

Originally Posted by Simosa

Hey can anybody tell me whether Bioinfinity is good for dry eyes? I have been wearing the old 'focus day and nights' which were amazing (just 24 % water so good for dry eyes) but they discontinued that line and replaced with a bad lens called air optix. I see that Bioinfinity allows a lot of oxygen through like day and night but because it is 48% water content I was concerned about them drying out your eyes. Can people tell me about whether this is a suitable lens switch from focus day and night?

ForceBwitu · #10 (**permalink**) 01-05-2010, 01:06 PM

Quote:

Originally Posted by rfriel

Biofinity have the highest water content of any SiHy lens with that high of oxygen transmissibility and that low of modulus too. Plus the fact the material is a naturally wettable material with no surface treatment. FN&D are 1st GEN SiHy, high modulus, low H2O content and must have a surface treatment to make them wearable, FN&D are not eye friendly lenses, IMHO

Hi rfiel. Welcome to Lens 101.

I like your answer, but some of it was a bit over my head. For example, what "modulus" and "SiHy"? Keep in mind that we're not all Eye Care Professionals here.

rfriel · #11 (**permalink**) 01-05-2010, 01:21 PM

modulus = deformation coefficient = stress/strain, how bendable or pliable is the material, i.e. how well will the material conform to the surface of the cornea?? lower modulus the better to prevent epithelial flaps and CLPC

Oh, SiHy = silicon hydrogel

surface treatment is important, percent water, 48% for biofinity, lens edge taper is important, Dk/t, oxygen transmissiblity, very important, lens thickness

3rd Gen SiHY lens break the relation between H2O content and Dk/t, 1st/2nd Gen SiHy H2O content(i.e. modulus) inversely related to Dk/t, 3rd Gen SiHy, H2O (i.e. modulus) directly related to Dk/t, or not related at all.

3rd Gen SiHy brand new polymer(crystalline structure), completely different from 1st/2nd Gen SiHy TRIS monomer

Quote:

Originally Posted by ForceBwitu

Hi rfiel. Welcome to Lens 101.

I like your answer, but some of it was a bit over my head. For example, what "modulus" and "SiHy"? Keep in mind that we're not all eye care professionals here.

dragongirl81 · #12 (**permalink**) 01-05-2010, 02:42 PM

Quote:

Originally Posted by rfriel

modulus = deformation coefficient = stress/strain, how bendable or pliable is the material, i.e. how well will the material conform to the surface of the cornea?? lower modulus the better to prevent epithelial flaps and CLPC

Oh, SiHy = silicon hydrogel

surface treatment is important, percent water, 48% for biofinity, lens edge taper is important, Dk/t, oxygen transmissiblity, very important, lens thickness

3rd Gen SiHY lens break the relation between H2O content and Dk/t, 1st/2nd Gen SiHy H2O content(i.e. modulus) inversely related to Dk/t, 3rd Gen SiHy, H2O (i.e. modulus) directly related to Dk/t, or not related at all.

3rd Gen SiHy brand new polymer(crystalline structure), completely different from 1st/2nd Gen SiHy TRIS monomer

Yikes! Epithelial flaps? CLPC?

Okay. I'm really dumb. I'm eighth grade reading level. I now know that "modulus" has something to do with how flexible a contact lens is, so does that mean a contact lens with a high modulus is very flexible?

When I got to that "3rd Gen SiHY lens break the relation between H2O content and Dk/t, 1st/2nd Gen SiHy H2O content (i.e. modulus) inversely related to Dk/t" part, I figured I must be really dumb because that doesn't make any sense to me.

rfriel · #13 (**permalink**) 01-20-2010, 01:31 PM

after walmart OD finally got off his keester, finally my biofinity trials are in, i'm excited to try these lens. will report back tomorrow how they fit, feel, and clean up, i am expecting great things from these biofinities, i hope they live up to the hype??

KITT · #14 (**permalink**) 01-20-2010, 02:03 PM

Quote:

Originally Posted by rfriel

after walmart OD finally got off his keester, finally my biofinity trials are in, i'm excited to try these lens. will report back tomorrow how they fit, feel, and clean up, i am expecting great things from these biofinities, i hope they live up to the hype??

I could be wrong, but don't you think your first mistake was going to a doctor in a discount store?

I still would like to know how the Biofinity contacts work for you.

rfriel · #15 (**permalink**) 01-21-2010, 11:13 AM

finally walmart came through, they gave me 6! trial lens, that's $60 USD worth of lens to try. i will go back in a week for a test fit and prescription of biofinity. i really want these lens to work, they are the only 3rd gen SiHY available right now with the highest H2O content, 48% for the given Dk/t and have slightly higher modulus than Oasys. no surface treatment, inherently wettable material, BUT alas a drawback, they tear easily. YUCK, i wonder why these lens are 1 month replacements when they tear so easily? that means in 6 months, i will have been to walmart for checkups 8 times, and tried 2 different types of lens with 12 trial pair, ALL for $40 USD. now other BAS***** OD wanted $500 USD for that service, so yes, watchout, walmart will put YOU outta business too. now i know no one goes to walmart, that is why they have optical, bank, auto, grocery and everything else, cause no one shops at walmart. so continue no going there and pay more for everything you do, suckers.

rfriel · #16 (**permalink**) 01-22-2010, 12:06 PM

than Oasys, why do biofinities tear so much more easily than oasys??
also, biofinities have 48% H2O vs Oasys at 38%, yet modulus for higher water content is higher?? very interesting. biofinities have broken all the rules relating Dk/t, H2O content and modulus, AND no surface treatments or additive required to bind the 48% H2O, and inherently wettable, very, very nice!!!

rfriel · #17 (**permalink**) 01-25-2010, 11:33 AM

Quote:

Originally Posted by rfriel

FN&D with the high modulus, rough edges and surface treatment just were not mechanically eye friendly. they worked for some people but epithelial flaps and GPC were common.

Biofinity are a completely different type material than 1st/2nd genertion type lenses. high water content does not necessarily mean they will dry your eyes out, it depends on the how the surface of the lens interacts with the eye. If there is a question if there is something better for you, give Biofinity a try. it's not like your making a life long committment, and dont buy a year supply before trying a new lens material for a couple of months either.

had biofinities for 1 week now, after handling, cleaning, inserting the lens for a few days, the modulus feels less than oasys, even though research papers show the modulus is higher?? maybe the increased H2O content being 48% vs 38% for oasys makes a difference in how the modulus feels. i am very careful with the lens since i have been alerted many times on this forum that the lenses tear easily. the oasys lens is easier to remove from the eye than biofinity. the biofinity lens is more slippery. upon insertion, i cant tell the lens is in the eye, in fact i can wear both oasys and biofinities for 18-20 hours / day without issue, as long as my eye allergies are in check. otherwise if allergies flare up, i have to pop a zyrtec or claritin. the biofinities are nice lens, for one month replacement, i am not sure the lens last that long, but i will find out soon, if the lens tears before 1 month is over. i will notify this poster if/when that happens.

dragongirl81 · #18 (**permalink**) 02-11-2010, 02:32 PM

Quote:

Originally Posted by rfriel

had biofinities for 1 week now, after handling, cleaning, inserting the lens for a few days, the modulus feels less than oasys, even though research papers show the modulus is higher?? maybe the increased H2O content being 48% vs 38% for oasys makes a difference in how the modulus feels. i am very careful with the lens since i have been alerted many times on this forum that the lenses tear easily. the oasys lens is easier to remove from the eye than biofinity. the biofinity lens is more slippery. upon insertion, i cant tell the lens is in the eye, in fact i can wear both oasys and biofinities for 18-20 hours / day without issue, as long as my eye allergies are in check. otherwise if allergies flare up, i have to pop a zyrtec or claritin. the biofinities are nice lens, for one month replacement, i am not sure the lens last that long, but i will find out soon, if the lens tears before 1 month is over. i will notify this poster if/when that happens.

It's been about two weeks. How are things going so far?

KITT · #19 (**permalink**) 02-22-2010, 05:33 PM

Quote:

Originally Posted by rfriel

I am not sure the lens last that long, but i will find out soon, if the lens tears before 1 month is over. i will notify this poster if/when that happens.

So how are those Biofinity lenses so far? Have you ripped one of them yet?

rfriel · #20 (**permalink**) 02-22-2010, 06:33 PM

Quote:

Originally Posted by KITT

So how are those Biofinity lenses so far? Have you ripped one of them yet?

after one month of the same biofinity lens, it feels and handles like oasys at the same time point, i wear one multifocal oasys and one regular biofinity. havent ripped a lens yet, BUT, one biofinity lens was blurry after about a week and i tossed it, the other biofinity lens i have used is at the one month and i havnt ripped it yet. i am careful to place saline in my eye and wet the lens before removal, which is very easy, i rub very throughly to clean before disinfection and i use both clear care and aquify. rotating cleaning and disinfection solutions. i rub very throughly after cleaning and before insertion. so, far the biggest problem is allergies and i have to use claritin or zyrtec, i would like to wear biofinity if i could and if a multifocal was avaialble i would use biofinity exclusively, have to wait until summer 2010 though.

dragongirl81 · #21 (**permalink**) 02-23-2010, 01:01 PM

Quote:

Originally Posted by ForceBwitu

You make several good points here. Let's check out the numbers you mentioned:

I happened to find a nice bar chart comparing the Dk (Oxygen transmission) and modulus (stiffness) of Focus Night & Day, Biofinity, Acuvue Oasys, O2 Optix, PureVision, Acuve Advance and Acuvue 2. As you can see, Biofinity compares quite well.

Looking at that bar chart it seems to be sorted by declining Dk values. Apparently the person who set this up had decided, for whatever reason, to place the Dk values ahead of modulus. Which is more important to you, breathability or flexibility?

rfriel · #22 (**permalink**) 02-23-2010, 01:09 PM

Quote:

Originally Posted by dragongirl81

Looking at that bar chart it seems to be sorted by declining Dk values. Apparently the person who set this up had decided, for whatever reason, to place the Dk values ahead of modulus. Which is more important to you, breathability or flexibility?

oxygen transmissibility, dK/t is higher value than modulus, although, modulus is important, FND high modulus are the reason they arent tolerated by a larger percentage of population even though the Dk/t is highest of any lens, the modulus precludes many from tolerating the lens. FND is like wearing a piece of plastic on your eye, very uncomfortable and not good for the cornea, epithelial flaps, conjunctivitis, etc.....

Spookytooth · #23 (**permalink**) 02-23-2010, 05:36 PM

Quote:

Originally Posted by rfriel

oxygen transmissibility, dK/t is higher value than modulus, although, modulus is important, FND high modulus are the reason they arent tolerated by a larger percentage of population even though the Dk/t is highest of any lens, the modulus precludes many from tolerating the lens. FND is like wearing a piece of plastic on your eye, very uncomfortable and not good for the cornea, epithelial flaps, conjunctivitis, etc.....

Good answer. Thank you rfriel.

Now, a "high" modulus means that the lens is very flexible and soft correct? RGP lenses would have a low modulus, right, because they're rigid?

Spookytooth · #24 (**permalink**) 02-23-2010, 05:36 PM

Quote:

Originally Posted by rfriel

oxygen transmissibility, dK/t is higher value than modulus, although, modulus is important, FND high modulus are the reason they arent tolerated by a larger percentage of population even though the Dk/t is highest of any lens, the modulus precludes many from tolerating the lens. FND is like wearing a piece of plastic on your eye, very uncomfortable and not good for the cornea, epithelial flaps, conjunctivitis, etc.....

Good answer. Thank you rfriel.

Now, a "high" modulus means that the lens is very flexible and soft correct? RGP lenses would have a "low" modulus, right, because they're rigid?

rfriel · #25 (**permalink**) 02-23-2010, 05:48 PM

Quote:

Originally Posted by Spookytooth

Good answer. Thank you rfriel.

Now, a "high" modulus means that the lens is very flexible ans soft correct? RGP lenses would have a low modulus, right, because they're rigid?

low modulus = very flexible, RGPs are rigid,= high modulus, but they are half the diameter of soft lens, i have not studied how modulus of RGP's effects the eye??

Knotlob · #26 (**permalink**) 02-23-2010, 05:50 PM

Quote:

Originally Posted by Spookytooth

Good answer. Thank you rfriel.

Now, a "high" modulus means that the lens is very flexible and soft correct? RGP lenses would have a "low" modulus, right, because they're rigid?

No, it's the opposite. High modulus is a relatively rigid lens, which doesn't deform so easily. In the extreme, a RGP lens.

A low modulus lens is very flexible and say for a Daily Disposable can be fiddly to insert, as it tends to fold in on itself when handling. But the low modulus lens will be generally more comfortable.

http://www.clspectrum.com/article.aspx?article=12906

knotlob

MillersLastChance · #27 (**permalink**) 02-24-2010, 11:49 AM

Quote:

Originally Posted by Knotlob

No, it's the opposite. High modulus is a relatively rigid lens, which doesn't deform so easily. In the extreme, a RGP lens.

A low modulus lens is very flexible and say for a Daily Disposable can be fiddly to insert, as it tends to fold in on itself when handling. But the low modulus lens will be generally more comfortable.

http://www.clspectrum.com/article.aspx?article=12906

knotlob

Okay, so I think I've finally got this. Spookytooth, are you paying attention?

"Modulus" is a fancy word for "stiffness" or "rigidity." So RGP, or "hard" contacts have a high modulus, and daily disposables are soft and "fiddly" with a low modulus.

Purpleiris · #28 (**permalink**) 02-24-2010, 02:10 PM

Quote:

Originally Posted by Purpleiris

That's okay, rfiel. I've heard worse. Like this one, for example:

Q: What's a pirate's favorite store?

A: Toys Arrrrrrrrr Us

I guess nobody liked my joke.

I suppose I'd better hold on to my day job . . .

dragongirl81 · #29 (**permalink**) 03-10-2010, 12:49 PM

Quote:

Originally Posted by rfriel

now i know no one goes to walmart, that is why they have optical, bank, auto, grocery and everything else, cause no one shops at walmart.

It's true. I've probably been to Wal-Mart three times in the last five years. If every Wal-Mart in existence was suddenly transported to the Moon by aliens, I probably wouldn't blink.

rfriel · #30 (**permalink**) 03-10-2010, 03:11 PM

Quote:

Originally Posted by dragongirl81

It's true. I've probably been to Wal-Mart three times in the last five years. If every Wal-Mart in existence was suddenly transported to the Moon by aliens, I probably wouldn't blink.

and just common sense, that no one shops at the biggest retailer in the fricken' world, just common sense, well maybe, dragonfirl81 kiind of common sense that is.

KITT · #31 (**permalink**) 03-12-2010, 02:23 PM

Quote:

Originally Posted by rfriel

and just common sense, that no one shops at the biggest retailer in the fricken' world, just common sense, well maybe, dragonfirl81 kiind of common sense that is.

Now calm down, rfriel.

Take a deep breath, run your comments through Spell Check, and throw in a little punctuation, just for fun. Let's calmly discuss this. Okay?

Okay. Wal-Mart is fine. Wal-Mart is great. We all love Wal-Mart, don't we, folks?

dim0n · #32 (**permalink**) 05-31-2010, 05:43 AM

[quote=rfriel;114975]the modulus feels less than oasys, even though research papers show the modulus is higher??

Modulus is almost the same between Oasys and Biofinity

Wookiee74 · #33 (**permalink**) 06-01-2010, 12:04 PM

[quote=dim0n;144699]

Quote:

Originally Posted by rfriel

the modulus feels less than oasys, even though research papers show the modulus is higher??

Modulus is almost the same between Oasys and Biofinity

Thanks for that nice graph, dim0n, and thank you for not mentioning Wal-mart.

MillersLastChance · #34 (**permalink**) 07-01-2010, 12:22 PM

[quote=Wookiee74;144795]

Quote:

Originally Posted by dim0n

Thanks for that nice graph, dim0n, and thank you for not mentioning Wal-mart.

Yeah it was good to get a break from all that bickering, wasn't it?

Cool graph, dim0n.

Spookytooth · #35 (**permalink**) 07-01-2010, 03:15 PM

Quote:

Originally Posted by MillersLastChance

Okay, so I think I've finally got this. Spookytooth, are you paying attention?

"Modulus" is a fancy word for "stiffness" or "rigidity." So RGP, or "hard" contacts have a high modulus, and daily disposables are soft and "fiddly" with a low modulus.

Okay, I think I've got it. Thank you to everyone who contributed to my greater understanding of contact lens modulus.

mgash · #36 (**permalink**) 07-16-2010, 07:31 PM

Quote:

Originally Posted by KITT

I could be wrong, but don't you think your first mistake was going to a doctor in a discount store?

I still would like to know how the Biofinity contacts work for you.

Dr is Dr regardless where they work.

Ragnarox · #37 (**permalink**) 07-19-2010, 12:07 PM

Quote:

Originally Posted by mgash

Dr is Dr regardless where they work.

Sure, I can put on a white lab coat and call myself Doctor Ragnarox, and even have a nice name tag, so would you like me to take your appendix out for you?

Georgiaonmymind · #38 (**permalink**) 08-13-2010, 04:37 PM

Wow, I've been away for a while since I posted this question back in 2008. I've gotten 36 replies so far. Thank you everyone for your Biofinity feedback and critiques.

mgash · #39 (**permalink**) 08-16-2010, 08:42 PM

Quote:

Originally Posted by rfriel

after walmart OD finally got off his keester, finally my biofinity trials are in, i'm excited to try these lens. will report back tomorrow how they fit, feel, and clean up, i am expecting great things from these biofinities, i hope they live up to the hype??

I am wearing mine, and they are tropical, at least they feel like the I am wearing the beach. I first used Walmart's Equate (ReNu generic), I felt like I was wearing sand. I switched to Complete and the problem continued. I read each of these MPS had an ingredient not compatible to Biofinity, switched to Opti-Free, had some improvement, but obviously these lenses don't like my eyeballs. I went back to my Focus Daillies, and will stay with them. I did try Cooper's Avaira, and had no problems, and they are similar lenses.

Knotlob · #40 (**permalink**) 08-17-2010, 04:02 AM

Quote:

Originally Posted by mgash

I am wearing mine, and they are tropical, at least they feel like the I am wearing the beach. I first used Walmart's Equate (ReNu generic), I felt like I was wearing sand. I switched to Complete and the problem continued. I read each of these MPS had an ingredient not compatible to Biofinity, switched to Opti-Free, had some improvement, but obviously these lenses don't like my eyeballs. I went back to my Focus Daillies, and will stay with them. I did try Cooper's Avaira, and had no problems, and they are similar lenses.

So, with Focus Dailies/CooperVision Avaira, did the Renu/Equate, Opti-Free and the Complete solutions work 'sand free', or did you use another lens solution?

knotlob

Walkthisway · #41 (**permalink**) 08-17-2010, 10:30 AM

Quote:

Originally Posted by KITT

Now calm down, rfriel.

Take a deep breath, run your comments through Spell Check, and throw in a little punctuation, just for fun. Let's calmly discuss this. Okay?

Okay. Wal-Mart is fine. Wal-Mart is great. We all love Wal-Mart, don't we, folks?

Yeah, I found out that Wal-Mart is a great place to pick up hobby supplies.

They even have an eye care center where you can buy contact lenses.

Spookytooth · #42 (**permalink**) 08-18-2010, 04:32 PM

Quote:

Originally Posted by ForceBwitu

You make several good points here. Let's check out the numbers you mentioned:

I happened to find a nice bar chart comparing the Dk (Oxygen transmission) and modulus (stiffness) of Focus Night & Day, Biofinity, Acuvue Oasys, O2 Optix, PureVision, Acuve Advance and Acuvue 2. As you can see, Biofinity compares quite well.

That's a sweet bar chart there, Force. I'm glad you found it and decided to share.

mgash · #43 (**permalink**) 08-18-2010, 10:46 PM

Quote:

Originally Posted by Knotlob

So, with Focus Dailies/CooperVision Avaira, did the Renu/Equate, Opti-Free and the Complete solutions work 'sand free', or did you use another lens solution?

knotlob

Gave up, put them away, and went back to daily lenses. I am using Ciba Focus Dailies, and Daysoft from Daysoftlenses.com

parivision · #44 (**permalink**) 08-21-2010, 08:44 AM

Quote:

Originally Posted by rfriel

FN&D with the high modulus, rough edges and surface treatment just were not mechanically eye friendly. they worked for some people but epithelial flaps and GPC were common.

Biofinity are a completely different type material than 1st/2nd genertion type lenses. high water content does not necessarily mean they will dry your eyes out, it depends on the how the surface of the lens interacts with the eye. If there is a question if there is something better for you, give Biofinity a try. it's not like your making a life long committment, and dont buy a year supply before trying a new lens material for a couple of months either.

some more customers ask the same questions, but i m unable to justified them, biofinity is having 48% water content, and silicon Hyd lens used by the dry eye patient, how the BIOFINITY LENS works with HIGH WATER CONTENT

Contact Lens Fitter · #45 (**permalink**) 08-22-2010, 09:40 PM

With HEMA lenses, there are two theories on dry eyes, 1) Use a low water lens, so it does not need to draw too much tear liquid to stay hydrated. 2) Use a high water lens to keep the eye hydrated. Unfortunately, neither is very effective. Until fairly recent, the only lenses that helped were either glycerol gel lenses or RGPs. Biofinity uses a new process to make the silicone gel strands that make up the matrix of the lens finer and longer. This results in a softer, high water lens. Have your patients try wearing a Biofinity in one eye and an Oasys or Air Opitix Aqua ( or a HEMA lens) in the other for a couple of days and see what happens. Gels do not not like to release liquids, they hold their own very well. Dried silica gel paks are put into many products to absorb any moisture that would cause things to spoil. Also useful in dry eye patients, is a product such as Systane, which will recondition the surface of the eye, if used twice a day. Patients can often increase their wearing time by two to four hours a day by just using reconditioning drops.
Nine times out of ten, in the side by side lens test, they will pick the Biofinity and tell you it's worth the money

NYGiants · #46 (**permalink**) 08-23-2010, 10:28 AM

Quote:

Originally Posted by Contact Lens Fitter

With HEMA lenses, there are two theories on dry eyes, 1) Use a low water lens, so it does not need to draw too much tear liquid to stay hydrated. 2) Use a high water lens to keep the eye hydrated. Unfortunately, neither is very effective. Until fairly recent, the only lenses that helped were either glycerol gel lenses or RGPs. Biofinity uses a new process to make the silicone gel strands that make up the matrix of the lens finer and longer. This results in a softer, high water lens. Have your patients try wearing a Biofinity in one eye and an Oasys or Air Opitix Aqua ( or a HEMA lens) in the other for a couple of days and see what happens. Gels do not not like to release liquids, they hold their own very well. Dried silica gel paks are put into many products to absorb any moisture that would cause things to spoil. Also useful in dry eye patients, is a product such as Systane, which will recondition the surface of the eye, if used twice a day. Patients can often increase their wearing time by two to four hours a day by just using reconditioning drops.
Nine times out of ten, in the side by side lens test, they will pick the Biofinity and tell you it's worth the money

So Biofinity is an example of a "gel lens"?

Contact Lens Fitter · #47 (**permalink**) 08-23-2010, 11:13 AM

Yes, soft silicone lenses are a gel compound. (kind of like gummy bearshttp://www.lens101.com/images/smilies/biggrin.gif)

Juicer · #48 (**permalink**) 08-23-2010, 11:47 AM

Quote:

Originally Posted by Contact Lens Fitter

Yes, soft silicone lenses are a gel compound. (kind of like gummy bearshttp://www.lens101.com/images/smilies/biggrin.gif)

MMmmm . . . gummy bears . . .

MillersLastChance · #49 (**permalink**) 09-28-2010, 03:48 PM

Quote:

Originally Posted by Ragnarox

Sure, I can put on a white lab coat and call myself Doctor Ragnarox, and even have a nice name tag, so would you like me to take your appendix out for you?

That's a very good point. It takes more than a title and a lab coat to be competent in medical procedures.

medeirosgabriela · #50 (**permalink**) 11-04-2010, 03:47 PM

I Have only had my Biofinites for 5 Months now and i have lost count of how many have ripped. some have ripped in my eye, some have ripped out of my eye.
I am becoming frantic at this situation because at this rate, my year supply of contacts will be over before the year itself is.
Does anyone have tips on keeping them from tearing?! i don't have long nails, for the record

Knotlob · #51 (**permalink**) 11-04-2010, 04:00 PM

Quote:

Originally Posted by medeirosgabriela

I Have only had my Biofinites for 5 Months now and i have lost count of how many have ripped. some have ripped in my eye, some have ripped out of my eye.
I am becoming frantic at this situation because at this rate, my year supply of contacts will be over before the year itself is.
Does anyone have tips on keeping them from tearing?! i don't have long nails, for the record

Hello medeirosgabriela and welcome to the forum.

I used to wear Biofinity briefly, but now wear RGP lenses.

I did damage a Biofinity lens once after only 6 days, though it was on the periphery of the lens and the lens was still wearable.

My optician told me there were probably two reasons:

I was using a barrel case where the twin basket sits inside a single barrel of solution. It is possible for the Biofinity lens to be caught by the lid of the basket and when I shook the lens solution/case, it may have torn the lens. It is recommended instead to use the lens case where there are two separate compartments and the lenses just sit in the case, not in a basket, so they should not be damaged if they are sitting in the centre of the case, away from the lids.

The second possibility is that the lens is drying out slightly by the end of the wearing period, even though the lenses don't feel particularly dry. When you pinch the lens off the cornea, if the lens is very dry, it may crease and create a weak point at which, a tear will develop later. Solution is to add a few drops of contact lens saline to each eye a few minutes before you take the lenses out.

You can also have your optician teach you how to remove the lenses from your eye by using the eyelids to squeeze the lens out of your eye.

Hope this helps.

(Are you from Madeira?)

knotlob

timetraveler · #52 (**permalink**) 11-04-2010, 04:23 PM

Quote:

Originally Posted by Knotlob

Hello medeirosgabriela and welcome to the forum.

I used to wear Biofinity briefly, but now wear RGP lenses.

I did damage a Biofinity lens once after only 6 days, though it was on the periphery of the lens and the lens was still wearable.

My optician told me there were probably two reasons:

I was using a barrel case where the twin basket sits inside a single barrel of solution. It is possible for the Biofinity lens to be caught by the lid of the basket and when I shook the lens solution/case, it may have torn the lens. It is recommended instead to use the lens case where there are two separate compartments and the lenses just sit in the case, not in a basket, so they should not be damaged if they are sitting in the centre of the case, away from the lids.

knotlob

Did that case with the twin baskets look like this, by any chance?

Knotlob · #53 (**permalink**) 11-04-2010, 04:40 PM

Quote:

Originally Posted by timetraveler

Did that case with the twin baskets look like this, by any chance?

Yes, that's the one that is suspected of damaging contact lenses.

knotlob

medeirosgabriela · #54 (**permalink**) 11-04-2010, 04:43 PM

Quote:

Originally Posted by Knotlob

Hello medeirosgabriela and welcome to the forum.

I used to wear Biofinity briefly, but now wear RGP lenses.

I did damage a Biofinity lens once after only 6 days, though it was on the periphery of the lens and the lens was still wearable.

My optician told me there were probably two reasons:

I was using a barrel case where the twin basket sits inside a single barrel of solution. It is possible for the Biofinity lens to be caught by the lid of the basket and when I shook the lens solution/case, it may have torn the lens. It is recommended instead to use the lens case where there are two separate compartments and the lenses just sit in the case, not in a basket, so they should not be damaged if they are sitting in the centre of the case, away from the lids.

The second possibility is that the lens is drying out slightly by the end of the wearing period, even though the lenses don't feel particularly dry. When you pinch the lens off the cornea, if the lens is very dry, it may crease and create a weak point at which, a tear will develop later. Solution is to add a few drops of contact lens saline to each eye a few minutes before you take the lenses out.

You can also have your optician teach you how to remove the lenses from your eye by using the eyelids to squeeze the lens out of your eye.

Hope this helps.

(Are you from Madeira?)

knotlob

My contact lenses case looks like the picture below, except for that one well has a green top, and one has a white top.
I use Opti fresh solution.
The I have had instances where my contacts have torn in the very middle, but most of the time it is on the outskirts of the contact.
I will try to re-moisturize my eye before i remove them it is just very annoying that I am "wasting" them so quickly when i really shouldn't.

No , I am not from Madeira.
My parent's are from Brasil. They do have great grandparents from Portugal and Italy, if that answers your question.

medeirosgabriela · #55 (**permalink**) 11-04-2010, 04:46 PM

Quote:

Originally Posted by timetraveler

Did that case with the twin baskets look like this, by any chance?

I can not post a picture
however if you google "contact lenses case" my contact case is the 2nd and 4th case in the first row.

Knotlob · #56 (**permalink**) 11-04-2010, 06:00 PM

Quote:

Originally Posted by medeirosgabriela

I can not post a picture
however if you google "contact lenses case" my contact case is the 2nd and 4th case in the first row.

Ah thanks for the clarification.

It depends which nationality Google you use. I tried the UK version and that doesn't seem to match your description. The US version may be the one.

I take it it is NOT like the case posted by TimeTraveller in post #52. Is it the contact lens case shown under AC Lenses - screw top? If so, that shouldn't be the problem, so it could be lens dryness.

See how you get on with saline or moisturising drops or better still ask your optician to show you the alternative method of lens removal.

Madeiras/Madeiros = wood in Portuguese?

Good luck

knotlob

unclebuck · #57 (**permalink**) 11-05-2010, 09:36 AM

Quote:

Originally Posted by medeirosgabriela

I can not post a picture
however if you google "contact lenses case" my contact case is the 2nd and 4th case in the first row.

I'll get you in with my pass, medeirosgabriela.

You mean this one?

ronmann · #58 (**permalink**) 11-20-2010, 03:17 AM

I LOVE Focus N&D but they're discontinued, so I get a sample of Air Optics N&D. My eyes feel SO dry. I don't mind the high modulus of N&D but I HATE dryness. What do you think my experience will be with Biofinity in terms of dryness feeling?

Knotlob · #59 (**permalink**) 11-20-2010, 05:59 AM

Quote:

Originally Posted by ronmann

I LOVE Focus N&D but they're discontinued, so I get a sample of Air Optics N&D. My eyes feel SO dry. I don't mind the high modulus of N&D but I HATE dryness. What do you think my experience will be with Biofinity in terms of dryness feeling?

I think you will need to try them yourself, but I wore them for a few months and found them exceptionally comfortable. I think the gel chemistry is slightly different to normal, so that their relatively high moisture (46%) doesn't cause dryness in the eye, yet gives superior comfort. They feel very thin and are low modulus/flexible so fell like a Daily Disposable lens to me (having come from annual/vial soft lenses).

knotlob

unclebuck · #60 (**permalink**) 12-21-2010, 01:30 PM

Quote:

Originally Posted by Knotlob

I think you will need to try them yourself, but I wore them for a few months and found them exceptionally comfortable. I think the gel chemistry is slightly different to normal, so that their relatively high moisture (46%) doesn't cause dryness in the eye, yet gives superior comfort. They feel very thin and are low modulus/flexible so fell like a Daily Disposable lens to me (having come from annual/vial soft lenses).

knotlob

I apologize in advance if you've already explained this, but I don't see anything in this thread so I'll ask. Why do you sound surprised that a lens that's "relatively high" in moisture would feel moist? Doesn't moisture in the lens mean moisture in the eye?

ronmann · #61 (**permalink**) 12-21-2010, 01:58 PM

I just bought Biofinity. They feel MUCH dryer than Focus Night and Day which are discontinued. There is not a huge selection for extended wear, overall they're a good lens at a good price.

mayibfrank · #62 (**permalink**) 12-21-2010, 03:06 PM

Quote:

Originally Posted by ronmann

I just bought Biofinity. They feel MUCH dryer than Focus Night and Day which are discontinued. There is not a huge selection for extended wear, overall they're a good lens at a good price.

So even though they're "MUCH dryer than Focus Night and Day" you still consider them "good" lenses, huh? You're very generous.

Knotlob · #63 (**permalink**) 12-21-2010, 04:17 PM

Quote:

Originally Posted by unclebuck

I apologize in advance if you've already explained this, but I don't see anything in this thread so I'll ask. Why do you sound surprised that a lens that's "relatively high" in moisture would feel moist? Doesn't moisture in the lens mean moisture in the eye?

I think there is some confusion here.

When people complain about their eyes feeling dry, that is normally caused by the contact lens loosing water by evaporation to the atmosphere. The hydrogel material (like any gel material) doesn't like loosing moisture, so it tends to draw moisture from the eye. Hence the dry eye feeling. The higher the moisture content of the hydrogel, the greater may be this loss of moisture from the eye, although high moisture lenses may feel very comfortable initially. High moisture in a hydrogel lens is good, as the water in a hydrogel lens aids oxygen transfer though the lens to the cornea.

In a modern silicone hydrogel lens material, oxygen transfer/permeability is achieved via the silicone molecules in the gel. The gel moisture content need not be high to give good oxygen transfer. The lower moisture content should give less drying of the eye for the reasons stated above. Unfortunately, silicone compounds tend to be water repelling/hydrophobic, so need special treatments to make their comfort tolerable/low wetting angle.

RGP lenses have zero water content and can be pretty high in oxygen permeability. But their silicone content gives a high wetting angle/low comfort value unless they are specially treated chemically to reduce the wetting angle, e.g. plasma coating.

RGP lenses are generally recommended for dry eyes, as the lens material will not dry out the eyes, as it has zero water content.

knotlob

Georgiaonmymind · #64 (**permalink**) 12-23-2010, 01:41 PM

Quote:

Originally Posted by Knotlob

I think there is some confusion here.

When people complain about their eyes feeling dry, that is normally caused by the contact lens loosing water by evaporation to the atmosphere. The hydrogel material (like any gel material) doesn't like loosing moisture, so it tends to draw moisture from the eye. Hence the dry eye feeling. The higher the moisture content of the hydrogel, the greater may be this loss of moisture from the eye, although high moisture lenses may feel very comfortable initially. High moisture in a hydrogel lens is good, as the water in a hydrogel lens aids oxygen transfer though the lens to the cornea.

In a modern silicone hydrogel lens material, oxygen transfer/permeability is achieved via the silicone molecules in the gel. The gel moisture content need not be high to give good oxygen transfer. The lower moisture content should give less drying of the eye for the reasons stated above. Unfortunately, silicone compounds tend to be water repelling/hydrophobic, so need special treatments to make their comfort tolerable/low wetting angle.

RGP lenses have zero water content and can be pretty high in oxygen permeability. But their silicone content gives a high wetting angle/low comfort value unless they are specially treated chemically to reduce the wetting angle, e.g. plasma coating.

RGP lenses are generally recommended for dry eyes, as the lens material will not dry out the eyes, as it has zero water content.

knotlob

Once again, Knotlob makes it all clear. Thank you.

Is there anyone out there who still isn't sure about this lens moisture thing?