1. Blind Rehabilitation Center, Edward Hines Jr Veterans Affairs Hospital, Hines, Illinois2Department of Ophthalmology and Visual Science, University of Illinois at Chicago School of Medicine, Chicago3Illinois College of Optometry, Chicago
2. Veterans Affairs Cooperative Studies Program Coordinating Center, Edward Hines Jr. Veterans Affairs Hospital, Hines, Illinois
3. Surgical Service, Philadelphia Veterans Affairs Medical Center, Philadelphia, Pennsylvania
4. Rehabilitation Medicine Service, Dayton Veterans Affairs Medical Center, Dayton, Ohio
5. Surgical Service, William S. Middleton Memorial Veterans Hospital, Madison, Wisconsin
6. Blind Rehabilitation Center, Edward Hines Jr Veterans Affairs Hospital, Hines, Illinois2Department of Ophthalmology and Visual Science, University of Illinois at Chicago School of Medicine, Chicago
7. Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland