Macular degeneration is the leading cause of vision loss, affecting more than 10 million Americans. A deterioration in the central portion of the retina causes this incurable eye disease. A part of the retina called the macula is damaged, no longer able to focus the central vision of the eye. This makes it unable to read, drive a car, recognize faces and colors, and see objects in fine detail. Many older people develop macular degeneration as part of the body’s natural aging process. The exact cause is unknown, but the condition develops as the eye ages.