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.
types
of cataract
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.
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.
