1. From the Departments of Psychology and 2Ophthalmology, Columbia University, New York, New York;
2. From the Departments of Psychology and
3. Ophthalmology, Columbia University, New York, New York;
4. SUNY College of Optometry, New York, New York;
5. Retina Foundation of the Southwest, Dallas, Texas; and the 5Department of Ophthalmology, UT Southwestern Medical Center, Dallas, Texas.