So What is a Cataract? Cataract is the clouding of the lens of the eye. (See above animation) Normally, light passes through the clear lens and is focused onto the Retina. However, the natural aging process can cause the lens to become cloudy. The Cataract or cloudy lens blocks the passage of light through the eye and causes distorted or blurred vision, glare, or difficulty seeing in poor lighting conditions.

Cataract surgery is the most common operation in the world. In the United States, more than 2.7 million procedures are performed annually. (National Institutes of Health)

There are 20.5 million cases of early cataracts among Americans aged 40 and older, and 50 percent of people older than 65 have developed significant cataracts. (National Institutes of Health)