OVERVIEW
A cataract is an opacification or cloudiness that develops within
the lens of the eye (See Photo). This
is a normal part of the aging process that most people experience at
some point. The lens is the part of the eye that focuses light on
the retina, and allows us to see things sharply. The lens functions
best when we are younger because it is crystal clear. As we age, the
lens slowly turns yellow, then brown, and sometimes becomes opaque
and white
(See Photo). An analogy is a window
that is never washed. As dirt accumulates, the window loses its
clarity, and it is no longer possible to see through it. Similarly,
sometimes a cataract progresses to the point that vision decreases.
Age is not the only cause of cataracts. Trauma or injury to the eye,
certain medications such as prednisone or cortisone, diabetes, and
other less common medical conditions may also cause cataracts.
Sometimes, people are even born with cataracts. Cataracts present at
birth may be small and harmless, or may be large enough to interfere
with vision.
A person with a cataract may notice problems such as blurred or
distorted vision, glare from sunlight, headlights, or other lights,
or trouble focusing on things. When these symptoms begin to
interfere with activities of daily living, removal of the cataract
may be recommended.
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