“The later years of both Claude Monet and Edgar Degas were marked by failing vision and corresponding changes in the style of their paintings, creating an ambivalence about their later work among both their contemporaries and today’s critics. … In a recent article in The Archives of Ophthalmology, Dr. Michael F. Marmor, a professor of ophthalmology at Stanford, used computer simulations to create images of what these artists might have seen as their vision declined.”