$Unique_ID{BRK01440}
$Pretitle{Nervous System and Sense Organs}
$Title{What is "Macular Degeneration"?}
$Subject{eyes vision macular degeneration}
$Volume{F-21}
$Log{
Anatomy of the Eye*0003001.scf}

Copyright (c) 1991   Tribune Media Services, Inc.


What is "Macular Degeneration"?


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QUESTION:  One of my friends thought her loss of vision was due to a
developing cataract, but a visit to her doctor has revealed that the condition
is one called "macular degeneration".  She is now seeking to find out all
about this condition that she can.  I would like to help her so please discuss
this disease in your column.  Her paper doesn't have it.

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ANSWER:  Macular degeneration is a visual disability marked by a progressive
loss of central vision.  It gets its name from the part of the eye that is
affected--the macula--which is the small part of the retina responsible for
sharp central vision.  It sends images in the direct line of focus to the
brain.  Thus the macula functions differently from the rest of the retina
which is responsible for peripheral and night vision.
     In macular degeneration, the afflicted individual becomes unable to
clearly distinguish objects and colors and loses the ability to see clearly at
long distances or to do close-up work.  This impairment involves a breakdown
in the membrane which separates the macula from underlying blood vessels which
nourish it.  As a result, the macula becomes physically displaced with an
unrestorable loss of central vision.  Severe eye injury, heredity, myopia
(nearsightedness) and certain diseases such as diabetes are believed to be
contributing factors, especially when young people are affected, but macular
degeneration is generally associated with the aging process which alters the
membrane slowly over time.
     Unfortunately, there are no perfect cures or treatments for most cases
that exist.  However, degeneration caused by infection or disease may be
treatable if diagnosed early.  In addition, laser treatment used to close off
damaged blood vessels in the macular area have proven effective in some cases,
and the use of magnifiers and high-intensity reading lamps provide many
patients with an increased ability to read.
ÿ
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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.
