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- $Unique_ID{BRK02003}
- $Pretitle{}
- $Title{Radial Keratotomy}
- $Subject{vision eyesight sight radial keratotomy cornea eyes eye retina
- cataracts cataract lens lenses glasses eyeglasses contact lens contact lenses
- corrective lenses}
- $Volume{}
- $Log{
- Normal vs. Cataracted Eyes*0003101.scf
- Blurred Retinal Image*0003102.scf
- Clear vs. Cloudy Vision*0003103.scf}
-
- Copyright (c) 1993 Tribune Media Services, Inc.
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- Radial Keratotomy
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- QUESTION: There have been a whole bunch of TV and radio ads that tell of a
- clinic where they can correct your poor vision with a new surgical procedure.
- I have been wearing glasses for more than 50 years, and wonder if this clinic
- can do anything for my failing vision. Do you know anything about the
- operation they perform, and could you please advise me?
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-
- ANSWER: I doubt that the new surgery is indicated for you if your vision has
- begun to fail recently. The type of operation being advertised these days by
- independent clinics is called radial keratotomy, and it is designed to change
- the curvature of the cornea of the eye, rather than to remedy any problems
- that may be occurring elsewhere in the eye. When light rays enter the eye,
- they are focused on the back of the eye by two parts of the eye. The first is
- the cornea, the transparent structure that forms the front of the eye. From
- there the light passes into the eye, and through the lens of the eye, finally
- focusing on the retina, which transforms the light into electrical impulses
- that are carried to the brain. If the lens becomes cloudy (cataract) or the
- retina becomes damaged, vision may become weaker, a situation that often is
- seen in older patients. However when the problem is the curvature of the
- cornea, light may not focus precisely on the retina, creating a blurred image.
- This is the problem that is solved by corrective lenses, provided either as
- glasses or contact lenses.
- In this operation, which has now been performed on between 500,000 to a
- million Americans since it was first introduced in 1979, a series of very
- superficial, microscopic incisions are made in a spoke like pattern on the
- surface of the cornea, using a diamond tipped blade. From 4 to 8 incisions
- may be made, depending upon the severity of the problem. This procedure
- changes the curvature of the cornea, so that the light rays now focus directly
- on the retina, providing a sharp picture. Significant improvement is usual,
- enough so that 60 percent of those having the procedure no longer require
- corrective lenses of any type. As with any operation there are risks,
- including infection, that can mar the results. And while it may provide good
- distant vision, it doesn't replace the need for reading glasses for those who
- have entered their late forties. However, your problem of failing vision
- requires an examination now to determine the nature of your condition, whether
- or not this operation is suitable for you.
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- The material contained here is "FOR INFORMATION ONLY" and should not replace
- the counsel and advice of your personal physician. Promptly consulting your
- doctor is the best path to a quick and successful resolution of any medical
- problem.
-