A cataract is any cloudiness or opacity of the natural lens of the eye, which leads to decrease in vision. It is the most common cause of vision loss in people over age 40 and is also the principal cause of blindness in the world.
A cataract is the clouding or opacification of the crystalline natural lens that is present in human eye . lens is situated in the eye behind the iris in a capsular bag .
The word cataract is derived in middle ages, from the Greek word “katarraktes” which means waterfall. Cataract is any opacity in natural crystalline lens or its capsule inside our eye.
There is a natural lens inside the eye, sitting behind the iris (the coloured area cantered in the pupil of the eye) and cataracts involve changes in clarity of that lens.
