According to my ophthalmologist, a cataract is a clouding of the normally clear lens of your eye. It is a very common condition, afflicting more than 3 million cases annually in the United States. People who have cataracts experience cloudy vision that is a bit like looking through a frosty or fogged-up window. This clouded vision makes it more difficult to read, drive a car (especially at night) or see the expression on a friend's face. Most cataracts develop slowly and don't disturb your eyesight in their initial stages of growth. But with time, cataracts eventually interfere with our vision.