What Are Cataracts?
Cataracts are a clouding of the normally clear or transparent lens of the eye resulting in cloudy vision. The lens focuses the light onto the back of the eye (the retina) in much the same way that the lens in a camera focuses light onto film. The lens of the eye is located behind the colored part of the eye (the iris). When a cataract forms, the lens can become so opaque and unclear that light cannot be easily transmitted to the retina. Many cataracts take years to develop to the point where a person’s vision is seriously affected.