A cataract is a clouding of the clear lens in the eye and is one of the leading causes of vision impairment. This clouding of the lens causes clouding of the vision, glare, and sensitivity to light and as It matures eventually blindness. While cataracts most commonly occur in those who are older, they can develop in younger people as well with some being born with the condition. Cataract can be treated with a relatively straightforward operation with people often experiencing a drastic improvement in vision almost immediately after surgery.