Question

Write about CATARACT.​

Answer 1

Answer:

Cataract. A cataract is a clouding of the lens in the eye which leads to a decrease in vision. Cataracts often develop slowly and can affect one or both eyes. Symptoms may include faded colors, blurry or double vision, halos around light, trouble with bright lights, and trouble seeing at night.

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Answer 2

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CATARACT :

The eye lens is made up of proteins arranged in a regular pattern. Because of this regular arrangement the eye-lens is transparent. In some eyes, the regular pattern gets disturbed and this decreases the transparency of the eye-lens. If the arrangement disturbs to a greater extent it may lead to an opaque eye-lens. This is called cataract. This defect is usually found in old age.

CORRECTION :

This defect cannot be corrected by placing a suitable lens before the eye-lens. Instead, it is corrected by a surgical operation by replacing the affected lens by an artificial lens.