Question

When is a person said to have developed cataract in his eye ? How is the vision fo aperson having cataract restored ?

Answer 1

A person is said to have developed cataract when the eye lens becomes progressively cloudy resulting in blurred vision.
The vision of a person having cataract can be restored after getting surgery done on the eye having cataract. The opaque lens is removed from the eye by surgical operation and a new artificial lens is inserted in its place.