1. From the Departments of Ophthalmology,2Visual Sciences Research Center, Case Western Reserve University and University Hospitals of Cleveland, Cleveland, Ohio; and
2. Yerkes National Primate Research Center and the4Department of Neurology, Emory University, Atlanta, Georgia.
3. From the Departments of Ophthalmology,5Neurology, and6Neurosciences and the2Visual Sciences Research Center, Case Western Reserve University and University Hospitals of Cleveland, Cleveland, Ohio; and