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Medical Forum / General / Vision / July 2008RGP Material
I wore Fluroperm 151 RGP lenses from 1995 until last year when an optometrist recommended that I switch to O2Optix lenses. He said that I would see better with an aspheric design lens. Although I had less of a problem with dust while wearing the larger soft lens, I think my vision was clearer with the RGP lens. For me, I'd rather put up with some minor occasional discomfort in order to see better. (Plus the RGPs are more economical and I can sleep with them in.) Are there any new RGP materials that allow more oxygen to get to the cornea than the Fluoroperm 151s? Are there any other reasons to switch from Fluoroperm 151 to a different RGP material? Bob Simon > I wore Fluroperm 151 RGP lenses from 1995 until last year when an > optometrist recommended that I switch to O2Optix lenses. He said that [quoted text clipped - 3 lines] > some minor occasional discomfort in order to see better. (Plus the > RGPs are more economical and I can sleep with them in.) Just wondering. Don't you notice any scratches in your lens? I get scratches in just 6 months. I wonder if some lens material is more resistant to scratches. Is yours extended wear? Noke > Are there any new RGP materials that allow more oxygen to get to the > cornea than the Fluoroperm 151s? Are there any other reasons to > switch from Fluoroperm 151 to a different RGP material? > > Bob Simon >> I wore Fluroperm 151 RGP lenses from 1995 until last year when an >> optometrist recommended that I switch to O2Optix lenses. He said that [quoted text clipped - 9 lines] > >Noke Noke, I wear my soft lenses until they get uncomfortable (burning sensation or feel loose). This varies from 3 - 5 weeks and I don't know why it's not more consistent. I try not to sleep in them except for the occasional short nap. I haven't noticed that the soft lenses get scratched but then I make sure my fingers are very clean when I take them out at night and I usually soak without rubbing. On the other hand, I wore my RGPs continuously for a month and rubbed them to clean. They DID get small scratches so I had them polished every other year or so. Bob > >> I wore Fluroperm 151 RGP lenses from 1995 until last year when an > >> optometrist recommended that I switch to O2Optix lenses. He said that [quoted text clipped - 22 lines] > scratches so I had them polished every other year or so. > Bob Didn't you read the advice of Mike Tyler. He said any scratched lens have holes which can harbor stuck up mucus, debris, bio-junk, bacteria, fungi, polishing material and/or ground up lens harming the eye. Polishing it would only remove the sharp edges but the hole is still there. So he advice it must be replaced every time there is sign of scratches. How could you use it for many years? Maybe one must replace it yearly. noke > Didn't you read the advice of Mike Tyler. He said any scratched lens > have holes which can harbor stuck up mucus, debris, bio-junk, > bacteria, fungi, polishing material and/or ground up lens harming > the eye. Well, I said most of that, but I didn't say "holes", I said "furrows." But the furrows are microscopic, and they do get cleaner when you wash them. Don't forget that gas perms the best safety record of any. Scratches and defects are so uncomfortable it's hard to keep wearing them and people don't. Yes, stuff accumulates in the scratches, but it accumulates on the surface too. Good cleaners make them safer by removing a lot of the gunk that collects in the scratches and on on the surface. Products like Lobob and Boston GP Cleaner usually work better than "multipurpose solutions." >sign of scratches. How could you use it for many years? Maybe >one must replace it yearly. I recommend 12-18 month replacement on most gas perms. -M Tyner > > Didn't you read the advice of Mike Tyler. He said any scratched lens > > have holes which can harbor stuck up mucus, debris, bio-junk, > > bacteria, fungi, polishing material and/or ground up lens harming > > the eye. > > Well, I said most of that, but I didn't say "holes", I said "furrows." But furrows are shallow long holes.. :) Anyway.. for those RPG lens with brand or category such as "UV" etched in them (mine has one). Is the lettering made with furrows? How could the manufacturer put that when furrows can harbor debris, etc.? Nokia > But the furrows are microscopic, and they do get cleaner when you wash them. > Don't forget that gas perms the best safety record of any. Scratches and [quoted text clipped - 14 lines] > > -M Tyner >I wore Fluroperm 151 RGP lenses from 1995 until last year when an > optometrist recommended that I switch to O2Optix lenses. He said that [quoted text clipped - 7 lines] > cornea than the Fluoroperm 151s? Are there any other reasons to > switch from Fluoroperm 151 to a different RGP material? Surprised that no one answered your last question yet. AFAIK, the RGP lens with the highest oxygen permeability (dk/t) is the Menicon Z lens. AFAIK, it is the only RGP lens approved for 30 day continuous wear. (I don't know if any other RGPs have been approved for extended wear at all. I'm really surprised that you wear those 1995 lenses overnight.) So, if you want to wear RGP lenses overnight, I'd suggest you ask your eye doc about the Menicon Z lenses. If he or she is not familar with them (being from a smaller Japanese company, rather than from the giant multinationals), you might want to find a different eye doc. I'm surprised that you say that one reason you want to keep with your old RGPs, instead of O2Optix, is that you can sleep in the RGPs, and not in the soft lenses. Actually, I would think that the O2O (I think now changed name to AirOptix, being made of a highly breathable silicon hydrogel material, sure would be better to sleep in than your old RGPs. Did your eye doc tell you that it's OK to sleep in your 1995 RGPs, but not OK to sleep in the O2Os?? Your other reason (for liking RGPs) does make more sense. A lot of people find clearer vision with RGPs. I used to wear RGPs. I wore them regularly, all day (not overnight) for about 30 years, so was certainly adjusted to them. Now I wear softs (N&D in one eye, Purevision toric in the other), and I wouldn't go back, even though my vision was probably clearer with RGPs. Why? A few reasons. One, I really like the comfort of softs. Compared to RGPs, feels like nothing is in the eye. Two, I like wearing the lenses overnight, which I never did with RGPs. (I guess it is possible now, with Menicon Z, but might feel strange, to have RGPs in eyes all night.) (If I was going back to daily wear, not wearing lenses overnight, it's possible I would go back to RGP. I find soft lenses much more difficult to insert and take out than RGPs, and it would be a pain to do that every day. But once a week is OK.) Also, several times in my life, an RGP lens fell out of my eye, and I couldn't find it. Then one has to order a new one, wait weeks for it, and pay a lot of money. With softs--first of all--much less likely to fall out of the eyes. Secondly, if one does lose a lens-no problem at all, take a new one out of the box, and put it in. But yes, if you want to wear RGP lenses overnight, you really should look into Menicon Z. (And until you get them, I would suggest you take your current lenses out each night, not sleep in them.) > I'm surprised that you say that one reason you want to keep with your old > RGPs, instead of O2Optix, is that you can sleep in the RGPs, and not in the [quoted text clipped - 3 lines] > you that it's OK to sleep in your 1995 RGPs, but not OK to sleep in the > O2Os?? Studies uniformly show that RGP lenses are associated with a lower risk of eye infection during overnight wear than soft lenses, safer even than silicone-hydrogel lenses. On Jul 12, 1:28pm, "MS" <m...@nospam.com> wrote: > I'm surprised that you say that one reason you want to keep with your old > RGPs, instead of O2Optix, is that you can sleep in the RGPs, and not in [quoted text clipped - 5 lines] > you that it's OK to sleep in your 1995 RGPs, but not OK to sleep in the > O2Os?? Studies uniformly show that RGP lenses are associated with a lower risk of eye infection during overnight wear than soft lenses, safer even than silicone-hydrogel lenses. I didn't know that. But did you see the original post, that I was responding to? The guy is talking about RGPs that he has had since 1995! Old, perhaps scratched, but beside that, even if at that time those lenses were rated for EW, 13 years ago, there have been a lot of advances in contact lens material since then, even with RGPs. So, would you say that his RGPs from 1995 might be safer to sleep in, than a new pair of O2Optix? That's why I recommended, if he chooses to sleep in RGPs, to ask his doc about Menicon Z, I think the most permeable RGP lens available today. (I think, if I remember correctly, meeting or surpassing N&Ds in dk/t.) Still, I would think it might feel strange, to wear RGPs all night, every night. >On Jul 12, 1:28pm, "MS" <m...@nospam.com> wrote: > [quoted text clipped - 25 lines] >Still, I would think it might feel strange, to wear RGPs all night, every >night. MS, Thank you for your replies. I should tell you that I am now more concerned about my health than I was in the past. I used to wear my Fluoroperm 151 lenses continuously for a month or more. I found that a few days after I cleaned them, they would get more comfortable. Perhaps this was because they became coated with something from my tears that made them more wettable. I now almost always take out my lenses at night and intend to continue whether RGP or soft. However, since I occasionally sleep with them in, I'm glad that my doctor is fitting me with ultra-permeable lenses so my corneas will get as much oxygen as possible. Like you, I also found that silicon hydrogel lenses were more comfortable than RGPs but I'm willing to put up with a little discomfort for clearer vision. And I am hopeful that when I get my new Boston XO2 lenses later this week, that I will easily adapt to them. |
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