Cataract

Cataract is the opacification of the crystalline lens of the eye. The lens is a transparent structure whose transparency may be disturbed due to degenerative process. This may lead to opacification of the lens fibres and this development of opacity in the lens is known as cataract.

How does the eye function normally?
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The light is refracted by the cornea and the normal lens and gets focused on the retina. This enables us to see clearly.
What is Cataract?
Cataract is the opacification of the crystalline lens of the eye. The lens is a transparent structure whose transparency may be disturbed due to degenerative process. This may lead to opacification of the lens fibres and this development of opacity in the lens is known as cataract.

The opacity of the lens scatters the light and prevents it from focusing light on the retina and hence causes blurring of vision.
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Why does Cataract Form?
Cataract formation is part of normal aging process. It is usually seen after 60 though sometimes earlier also. It may be precipitated earlier by diabetes, drugs like steroids, injury, certain metabolic disorders and other eye diseases.