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Gas Permeable Contact Lenses A discussion of gas permeable contact lenses such as Boston 7, Boston Envision, Boston EO, Boston Equalens, Boston Equalens II, Boston ES, Boston II, Boston IV, Boston RXD, Boston XO, Boston XO2, Flosi, Fluorex 300, Fluorex 500, Fluorex 700, Fluorocon, Fluoroperm 151, Fluoroperm 30, Fluoroperm 60, Fluoroperm 92, Hydro 02, OP-2, OP-3, OP-6, O-Perm 30, O-Perm 60, Optacryl 60, Optimum Classic, Optimum Comfort, Optimum Extra, Optimum Extreme, Paragon HDS, Paragon HDS 100, Paragon Thin, Paraperm 02, Paraperm EW, PMMA, Polycon II, SA 18 (Phoenix 18) , SA 32 (Phoenix 32), SGP I, SGP II, SGP III, Trans-aire


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Gas Permeable vs. Soft Lenses

This is a discussion on Gas Permeable vs. Soft Lenses within the Gas Permeable Contact Lenses forums; I have been wearing gas permeable lenses for 2 years, but recently I have been ...


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  #1 (permalink)  
Old 11-19-2004, 03:23 PM
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Default Gas Permeable vs. Soft Lenses

I have been wearing gas permeable lenses for 2 years, but recently I have been thinking about changing to disposable lenses? Does anyone have any thoughts about that, anyone gone through the transition?
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Old 04-13-2005, 04:15 PM
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Default many years of experience

I am 54. I started wearing hard (non gas permeable) lenses at 14 years old or 40 years ago. After 22 years my cornea experienced a problem due to oxygen deprivation. Cloudy vision was the symptom - )like I was in a smoky room.) After a 6 week rest with glasses, I started in gas permeables and preferred hard lenses because I could see more detail with hard GP than with soft. I have astigmatism (sp?).
Keep in mind 40 years of hard lenses now - now my eyes have a condition that supposedly has been worsened if not caused by so many years of hard lens wear. The surface of my eyes has a "bumpiness, lumpiness, or corrugation (best description I can come up with) on the surface. I can't remember the name of the condition --- I assume this forum is monitored by doctors and other professionals who can fill in the name of the condition for me.---
For this reason alone, I suggest getting out of hard lenses ASAP if you can see with soft.
Ask your professional about this condition. I am not a candidate for lasik because of it.
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Old 05-18-2005, 10:44 AM
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I wore gas permeable lenses for several years, after wearing soft lenses, then switched to soft when disposables became available. Generally, the soft lenses are more comfortable and can be worn for more hours, but my vision was a little better with the rigid lenses. The transition to soft lenses was quite easy and disposables are great because the old non-disposable lenses wore out quickly.
Quote:
Originally Posted by Unregistered
I have been wearing gas permeable lenses for 2 years, but recently I have been thinking about changing to disposable lenses? Does anyone have any thoughts about that, anyone gone through the transition?
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Old 05-26-2005, 06:07 PM
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Default Gas Perm vs. Soft

There is no easy answer for this question. If you are looking for the best vision than gas perms are the best lens. The rigidity of the lens allows a layer of tears reffered to as the lacrimal lens to fill in behind the lens and fill in any imperfections on the cornea ultimately giving you the most supperior vision.

If it is comfort that you want soft lenses hands down beat the gas perm in this arena. The soft nature of the lens helps it contour to the eye better allowing less lid to lens edge sensation, however the soft pliable nature of the lens also makes it contour to the eyes imperfections more reducing visual accuity to a degree.

I would also say that gasperm lenses are healthier for the eye due to the higher oxygen permeability, but with newer silicone hydrogel lenses on the market the oxtgen permeability is not much of a factor anymore.

For certain conditions, like keratoconus or high amounts of astigmatism the gas perm lenses are almost the only lens that will give you acceptable acuity.
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Old 06-02-2005, 08:56 AM
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Rusty,

Sorry to hear about your problem due to PMMA hard lenses. The new RGP lens are VERY different. They can be fit much better to your eye and allow alot better tear circulation and oxygen to the cornea than the old PMMA lens.

Did the doctors tell you whether the condition will clear up over time?

Tigs
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Old 06-04-2005, 06:03 PM
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Why not stick with what you have? You are used to them and they will give you great optics. Plus you may save money in the long run.
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Old 06-08-2005, 02:49 AM
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Default Why isn't Menicon Z more popular?

This lens has a higher Dk/t than Night and Day, albeit rigid, and is appr0ved for 30 day wear. Can any lens approved for 30 day wear be uncomfortable? Is it too hard to fit or too $$$? Does it require too heavy a tear layer?
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Old 06-08-2005, 08:52 AM
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Quote:
Originally Posted by aLensUsr
This lens has a higher Dk/t than Night and Day, albeit rigid, and is appr0ved for 30 day wear. Can any lens approved for 30 day wear be uncomfortable? Is it too hard to fit or too $$$? Does it require too heavy a tear layer?
Any lens can be uncomfortable. We have had a few patients come back with silicone hydrogels saying that it feel like there is something in thier eye and want to go back to thier other brand. I don't think that Menicon Z will be that big. The rigid lens market in the U.S. is pretty small, but I am sure that this lens will have its place. A normal tear layer is all thats needed for any contact lens.
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Old 06-30-2005, 11:59 AM
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Default Menicon Z & Squash

I've worn GP lenses for about 20 years now, largely motivated by my
playing squash. One thing I've noticed throughout is that if there's
even a slight problem in the original fit of the lens on the cornea it
becomes enormously exaggerated when playing squash/sport-in-general. As
a result of which, in the UK, I'd expect it to take at least 2 attempts
before homing in on the "correct" lens. I wonder how that compares
with a soft lens fit?

Here in Japan, over a 10yr period, it's been a nightmare. On average,
a good 3 attempts before arriving at a decent fit. One contributing
reason for this apparently being the differing "starting point" over here,
i.e. the use of smaller-sized lenses.

A current predicament relates to Menicon Z. Recently I decided to upgrade
(right eye only, I'm right-eye dominant as well) to this brand but have
discovered that I experience
some slight blurring when viewing the squash ball during a game.
True, once the eye blinks the acuity usually returns. However, given the reduced
blinking rate in sq. (eyes on the ball!) the blurring is a bit off-putting,
and contrasts markedly with the sharp image (thoughout) I was used to with the old
lenses.

I've been assured that the menicon Z lens was made to the same specs as the old one
(which comes from a different shop).

Of course, in the shop and under calm testing conditions, this
behavior can't be measured......and am sure they must think I'm
barmy. Despite which the opticians there have been gracious/patient
enough to try for a 3rd lens. The latter I started using today, which although
better (it was made slightly stronger) appears to yield the similar blurring effect
on the moving ball image. True, it' slight, but it's a new phenomenon for me
and enough to cause a momentary hesitation at times (mainly on the forearm for some reason!).

Shall persist for another couple of months before possibly changing to
another lens maker or, inconveniently, going back to the "old" shop and living with 2 lenses
from 2 differing shops....

Is there any information on sport and GP lenses? Most of what I see relates
to soft lens use.
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Old 06-30-2005, 05:15 PM
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Soft lens are generally recommended for sports. They are less likely to shift and pop out.
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Old 07-27-2005, 12:25 AM
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Default i have given up

i was given lenses about a month ago,i have kerataconus. i took them back the very next day because i found them next to impossible to put in, i went back a couple of days later and had a lesson on putting them in, i then wore them for that day, and managed to loose one that night,i dug around in my eye trying to find the lens as a result i had an infection.and i couldnt wear my lenses.i did find the lens the next day,but ever since then i have lost all confidence, it takes me agaes to get them in,during which the kids decide to argue and fight,then if i carry on and get them in my eyes just constantly water,i am soo sacred the are giong to fall out.the glare is blinding,and after about half an hour everything is just as
blurry as if i wasnt wearing them,no one can give me a straight answer about cost of them either,so im scared to go back in case i get hit with a bill that i cant pay,i wont even go near them because the kids will start or the phone will ring.yes my vision isnt great but i know what im dealing with and it may or may not get worse,i know some of you think gp lenses are great but i dont agree too many things have gone wrong
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Old 07-27-2005, 06:43 AM
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Wow sorry to hear that Hunnyb. Kerataconus is no picnic. I am assuming that it is pretty mild by the fact that you will still wear your glasses? With kerataconus the lenses are much more difficult to fit and I think are a bit tougher to produce that accounts for the cost. I had a friend with kerataconus who had the same issuses that you had. He went to another doctor and was refit and now its ok. There are several options out there some lenses combine both hard and soft materials. It may be annoying now but once you get the hang of it, or a new doctor, you will be happy you did. You will never get the same vision with glasses that you will get with contacts but if you condition progresses you will be happy you got the adaptation period out of the way.
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Old 07-27-2005, 02:54 PM
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Angry past glasses

my vision isnt great,i have gone past glasses they make no difference my father is always saying put your glasses on,if sure i put them on and have the same vision.we are in Hamilton new zealand, home of the rose k lens.and my eye doctor wont use it.we have an appt on monday to discuss the problems im having,i can still see well enough to do most things,somtimes it takes me longer than i want it to, the last two weeks i have been impossible to live with,because of the lenses.im not a paitient person and trying to put lenses in makes me worse.i never got my drivers licence so im safe there. i think i have just lost my confidence not only in me but in my eye dr as well,i went on the specialists reccommendation
because the condition is rare i dont know anyone else i can talk to about it.ever since i have had theses lenses my eyes have been so sore and itchy so the i rub them a lot,i know its not helping but they are so sore,this is going to sound weird but i have more freedom now with bad vision than when i have my lenses in,i just want the whole thing to go away
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Old 07-27-2005, 10:50 PM
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Don't give up!! Keep looking for the right doctor. With your condition you do need one and a good one so take your time. Good luck!!
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Old 07-30-2005, 08:31 PM
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Smile feeling better

thanks for the replys, i have been thinking for a few days about lenses in general, and got up today and decided to try my lenses again,i got the left lens in first time but the right was a bit more tricky, then my husband suggested wetting my finger with solution,i was a bit hesitant but guess what, it worked.i am still going back to my eye dr tommorrow (monday) to ask what symptoms are normal and see if my vision has settled down from last time,i stiil want to know why he wont use the rosek lens .i have decided that if i loose a lens well so be it.
i would just like to say thanks for the support.
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Old 07-31-2005, 10:37 PM
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Smile i understand more now

well, i understand things a lot better now,i had a good talk with my eye dr this morning and things are much clearer now.
my condition is at the mild stage and if things get really untolerable i can use soft lenses,the reason why he doesnt recommend tke rosek is because the bump is at the bottom not in the middle.the rose k is good if the cone is central.my lenses are from sweden are are really good.he also said if i do loose a lens and cant afford to pay for a replacement he will sort something out,so things seem to be getting better,
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Old 08-04-2005, 06:44 AM
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YEAH! You have one heck of a Dr.!!
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Old 08-05-2005, 01:24 PM
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Default the worst of all worlds

I am 49
a healthy fit male but developed kerataconus and have a bad stigmatism at age 40. My eyes continually change and so this mean that i need new glasses and lenses regularly. I am also an athlete and wear soft lenses, The soft lenses work in the day for sports but when acutity is required I am not able to see. Driving is really tough at night because the lights are splayed etc. I can get away with glasses and soft lenses in the day but neither is perfect. I tried hard lenses and just could not get comfortable and i also tried the hard soft combo but that did not work because I was always looking through the seam where the hard met soft and this did not work

HELP!!!!!!!!!!!!!!!!. Im prepared to try anything . If you have kerataconus try looking through a pair of pin hole glasses to remember what vision was like before the disease.
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Old 08-21-2005, 06:10 PM
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If I had my time back I would have never changed from soft lenses to hard lenses. I've had nothing but trouble with my hard lenses. My eyes often tear up and it always feels like I have dirt in my eyes. I find that I see a ring around lights and I often get glares from lit objects like tvs and computers.

My doctor had advised me to change from soft to hard lenses because my vision was getting bad. From the beginning I hated my lenses but he told me it would take some getting used to because I had become so used to soft lenses. (I had soft lenses for about 9 years) I listened to him. I've had my hard lenses for a year and a half and they still bother me. I've tried to go back to soft lenses but because my eyes have adjusted to the hard lenses I now cannot see with soft lenes. I find that my contacts dry out often and my doctor has given me countless different kinds of solutions to help but nothing works. I do know how to take care of my contacts. I've gone over all of the steps I do to clean my lenses and my doctor has told me that I am doing all of it right so it's not me but the lenses.

My advice stick to soft lenses for as long as possible. I can't wait for the day that I can have lasik surgery.
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Old 08-22-2005, 11:10 PM
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It seems like they are not fitting quite right.
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Old 08-23-2005, 12:11 AM
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^^That is what I told my eye doctor but he says that they are the right fit. I've been tempted to try another eye doctor to see what he has to say but it just costs so much to jump from one eye doctor to another.
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Old 11-02-2005, 01:33 PM
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Smile Kerataconus

Hunnyb, I have this condition myself, and I have been doing a lot of research on this. There is a new solution for this, it's called intacs, it is still being developed. Intacs are small lenses that are semi-permanently fitted on your eye to hold the cornea in the correct shape. You have to wear a lens with it, either RGP or soft. It definitely is the next option if you do not want to get a corneal graft. I am certainly looking into this. If it can improve my vision without surgery, I'll do it.
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Old 12-13-2005, 08:22 PM
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Default Switched from RGPs

I wore gas perms for a few months. Other than the usual adjustment issues of just getting used to them, I had one rather bad experience that pushed me to go with soft lenses. I was house-sitting for a friend for a few weeks who lived a few blocks from the beach. Late one night I was bored and went for a walk on the beach. The wind blew some mist from the ocean into my face, I sneezed and BOTH of my contacts popped out! At the time I wasn't too worried about how much they cost. The problem was that I'm very nearsighted, -19 in one eye and -18 in the other. And of course I didn't have my glasses with me. So there I was, alone in an unfamiliar environment and I couldn't see a thing. I was too lazy to carry my shoes and had left them by a picnic table when I first got to the beach. I couldn't find those either.

I had never had a problem with a lens popping out until then and I certainly didn't expect to lose both at the same time. I really cant recall a time when I felt as scared and helpless as I did that night. While trying to find my way back to the house, everything was so blurry and I was so disoriented I ended up getting lost. There's nothing like wandering around barefoot and practically blind, feeling your way from one light post to the next for a couple of frightening hours. The only reason I got back to the house at all was because a cop cruised by and saw that I was walking with one hand against someones fence and the other out in front of me.

After that I switched to soft lenses. They are a lot more comfortable and a lot less likely to pop out and render me helpless again.
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Old 01-30-2006, 01:14 AM
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I wear soft lenses and have pretty bad astygmatism. I wish the vision was better. Although it's nice to be able to toss them and not worry about cleaning them. Never tried hard lenses but not sure if it's worth a try.

Last edited by LENS101; 02-13-2007 at 04:02 PM..
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