What is a cataract?
A cataract is formed when the natural lens of the eye, responsible for focusing light and producing sharp images, becomes cloudy and hardens, resulting in a loss of visual function. The lens of the eye is normally clear at birth but is one of the first parts of the body to show the effects of aging.
A cataract is painless and usually develops gradually over several months or years. Normally, the onset of a cataract in one or both eyes may cause decreased night vision, impaired depth perception, and increased color distortion.