Cataracts are the leading cause of vision loss in the U.S. Most people over 65 have some degree of cataract development. A cataract is the gradual clouding of the natural lens that is inside your eye. In order for the eye to work properly, it needs a clear lens to focus light on the retina. Although cataracts are not preventable, luckily they are very treatable with cataract surgery. Once the cataracts begin restricting your activities or decreasing your ability to participate in normal activities such as reading, working or driving, its time to talk with your doctor.