TwilightBy: Henry Grunwald 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 degenerationa gradual loss of sight that affects almost 15 million Americans yet remains poorly understood and is, so far, incurable. In Twilight, he chronicles his experience of disability: the