He was awarded the Binkhorst Medal, was named one of the 25 most influential ophthalmologists of the 20th century, and was appointed to the Alberta Order of Excellence. He lives in Calgary, Alberta. David Chang, M.D., is a clinical professor of ophthalmology at the University of California, San Francisco. He is the chairperson of the cataract section of the American Academy of Ophthalmology program committee. He lives in Los Altos, California.