1. From the Center for Vision Research, and the1Departments of Ophthalmology,
2. From the Center for Vision Research, and the1Departments of Ophthalmology,3Physiology and Neuroscience, and
3. Department of Biomedical Sciences, Cornell University, Ithaca, New York; and the
4. From the Center for Vision Research, and the1Departments of Ophthalmology,5Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, New York.
5. From the Center for Vision Research, and the1Departments of Ophthalmology,6Biochemistry and Molecular Biology, SUNY Upstate Medical University, Syracuse, New York; the