Cataract is an eye problem in which protein is deposited over eye lens that leads to cloudiness of lens which results in loss of vision. It begins with interference in daily activities. It refers to change in the appearance of eye lens, as it becomes opaque and whitish in cataract. Normally it occurs with advancing age and about 70% of old people above 75 years of age suffer from cataract. Usually it occurs in both eyes but mostly the one eye is affected earlier than other.
