1. Frank Stein and Paul S. May Center for Low Vision Rehabilitation, California Pacific Medical Center, 2340 Clay Street, Fifth Floor, San Francisco, CA 94115, and research scientist, VA Palo Alto Health Care System, 3801 Miranda Avenue (MS 151A), Palo Alto, CA 94304;
2. Frank Stein and Paul S. May Center for Low Vision Rehabilitation, California Pacific Medical Center;
3. VA Palo Alto Health Care System, and clinical associate professor, Stanford University School of Medicine, 300 Pasteur Drive, Stanford, CA 94305;