1. Department of Ophthalmology, Harkness Eye Institute, Columbia University, New York, New York
2. Department of Psychology, Columbia University, New York, New York
3. Department of Ophthalmology, Harkness Eye Institute, Columbia University, New York, New York 2Department of Psychology, Columbia University, New York, New York
4. Schepens Eye Research Institute and Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts