Question

Which part of the eye gets affected if someone is suffering from cataract? How is it treated?

Answer 1

A cataract is more commonly referred to as blurry vision or fuzzy vision. It is the same as the vision through a frost. Cataracts generally damage both eyes, although they might also damage just one. The majority of cataracts develop as people age, generally beyond the age of $40$. Cataracts are the most frequent cause of vision loss in people all over the world, but they may be treated.

Complete solution:
In cataract the lens of the eyes is affected and becomes cloudy.
A cataract is a clouding of the natural lens behind the iris and pupil of the eye.
The reason behind the formation of blurry image in cataract can be explained as follows-
Light travels through the clear lens to reach the retina in a normal eye. For the retina to get a crisp image, the lens must be clear. The image formed on the retina will be blurry or distorted if the lens is cloudy due to a cataract, and the vision will be blurry. The severity of the visual disturbance is determined by the degree of lens cloudiness.
Treatment of cataract:
The only way to treat a cataract is through surgery. In a cataract surgery the cloudy lens is surgically removed and replaced by a clear lens.

Note:
As a cataract progresses, there is a loss in vision clarity that is not correctable with glasses. There is a loss of contrast sensitivity and a double vision is often observed. As light enters the eye and is scattered by the cataract, a disturbing glare may be observed. Around lights, haloes can be seen. Night vision will be diminished.