Cataract is an 8-letter cloudy eye condition that is caused by the clouding of the lens in the eye. It is a common condition that usually affects people over the age of 60, but can also occur in younger people due to injury or other medical conditions. Cataracts can cause vision problems such as blurred vision, double vision, and difficulty seeing at night. Treatment for cataracts typically involves surgery to remove the cloudy lens and replace it with an artificial one.