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- Path: sparky!uunet!tis.com!richard
- From: richard@tis.com (Richard Clark)
- Newsgroups: sci.med
- Subject: Re: Veins on cornea (Q)
- Date: 25 Jan 1993 17:03:39 GMT
- Organization: Trusted Information Systems, Inc.
- Lines: 54
- Message-ID: <1k16hbINNfc2@sol.tis.com>
- NNTP-Posting-Host: sol.tis.com
-
- In article <rbkatz-250193093120@128.96.93.103> rbkatz@cc.bellcore.com (Bob Katz) writes:
- >A friend recently learned from an optometrist that some veins have appeared
- >on the periphery of one of her corneas. The cause was reduced oxygen to
- >the cornea due to contact lenses. She has daily wear, gas permeable lenses
- >(which she now wears 16 hours a day, 7 days a week), but apparently the
- >oxygen permeability of gas permeable lenses can be as low as 14%.
- >
- >The optometrist felt that she can continue to wear contacts, but should
- >give her eyes a rest by using glasses more often. He felt that the
- >increase in oxygen could cause the veins to recede. Even after receding,
- >however, he thought they might leave thin, white lines on the cornea.
- >
- >Any opinions on this matter and the accuracy of the optometrist's
- >information?
- >
- >Thanks.
- >
- >bob
-
- Yeah... Listen to the optometrist... Mine screamed at me a few
- years ago for the same thing... Made me wear glasses for four months until
- the veins went away... But I was being *terrible* to my eyes at the time,
- I'd wear Permalens (extended wear) for months at a time without taking them
- out... Luckily Permalens is very high water content (75%?), which means more O2
- permeability, which meant the damage was only minimal and went away on its
- own accord.
-
- A few notes I've picked up along the way: higher water content
- usually means better O2 permeability, although lens thickness plays a
- part too. If you feel a slight burning after closing your eyes for a few
- minutes, you are indeed feeling O2 deprivation and should remove your lenses,
- then either clean or replace them.
-
- I've finally made the realization that my eyes have to last for
- another fifty years or so... So I've been looking into the disposable
- extended wear lenses, knowing that every couple weeks I'll get a nice clean
- pair without the fuss. (I hate taking out my lenses and cleaning them,
- which is seriously *NOT GOOD*!)
-
- Anyway, I'm *NOT* a doctor, and your eyes are nothing to mess
- with. I'd recommend strongly that she listen to her optometrist and
- start taking better care of her eyes! She may want check out a different
- kind of lens too, as the current ones *should* be able to supply sufficient
- O2 with normal wear during the day, but since they are not, it may be
- better to find a pair that *does*.
-
- Good luck!
-
- -----------------------Relativity Schmelativity-----------------------------
- Richard H. Clark My opinions are my own, and
- LUNATIK - watch for me on the road... ought to be yours, but under
- It's not my fault... I voted PEROT! no circumstances are they
- richard@tis.com those of my company...
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