Marion Kleinfeld got up one Sunday morning, picked up the newspaper, settled down to read it, and couldn't see the words. Kleinfeld, 79, of Delray Beach, Fla., already blind in her right eye, lost sight in her other eye because of a condition called wet age-related macular degeneration, AMD, the leading cause of blindness in people over 55. Leaking blood vessels in the back of the eye cause a large black spot in the center of vision. "I could not see at all. It was very frightening," she said. After years of having to tell patients losing their eyesight to...