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What is a cataract?
A cataract is a progressive
clouding of the human lens inside the eye. The lens is a
small oval like structure and consists of a thin capsule
(like saran wrap) enveloping a bag of protein.
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Whitish
pupil shows the cataract
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The protein is crystal clear and colorless at birth but discolors
and clouds with age:
first yellow, then brown, and finally cloudy. |
When the lens becomes cloudy and interferes with vision, it
is called a cataract. |
Clear
lens - Cloudy lens
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The lens no longer transmits or focuses light clearly. A cataract
is not a growth, a "skin", or a disease. It is usually
not a sign of eye or systemic disease. |
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