Each person is born with a natural lens in the eye, known as the crystalline lens. Over time, this lens may become yellow, brown, and eventually turn white or black. As this process progresses, less and less light is allowed to pass through the lens to reach the back surface of the eye (the retina). The light that does pass through becomes increasingly distorted. This condition causes deterioration in vision, usually progressively over time. Cataract surgery involves removing this cloudy lens and replacing it with a clear, new lens to restore sharp vision. Modern techniques allow us to perform this procedure using tiny incisions, and laser energy to soften and break up the cloudy lens. Certain lens implants allow sharp vision at distance, intermediate, and near with minimal or no dependence on glasses.