"In 1992, when Henry Grunwald missed a glass into which he was pouring water, he assumed that he needed new eyeglasses, not that the incident was a harbinger of darker times. But in fact Grunwald was entering the early stages of macular degeneration - a gradual loss of sight that affects almost 15 million Americans yet remains poorly understood and is, so far, incurable. Now, in Twilight, Grunwald chronicles his experience of disability: the clouding of his sight, and the daily struggle to overcome its physical and psychological implications; the discovery of what medicine can and cannot do to restore sight; his compulsion to understand how the eye works, its evolution, and its symbolic meaning in culture and art." "This is a story not merely about seeing but about living; not merely about losing sight but about gaining insight."--BOOK JACKET.