Write down the some defects of human eye?

Write down the some defects of human eye?
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1 Answer

Answer :

Far Sighted Vision: -

In this defect image is formed behind the retina. The cornea and the lens cannot bend

the light rays on retina. To treat this defect artificial lenses are used that bend the

incoming rays on retina and form a clear image on retina.

Near Sighted Vision: -

In this defect image is formed in front of the retina. To treat this defect concave lens

is used that focus the light or retina.

Colour Blindness: -

In this defect a person cannot distinguish between green and red colours and is called

colour blind. 
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