1 Departments of Ophthalmology and Neurology (GTP), University of Pittsburg, Pittsburg, Pennsylvania; Departments of Ophthalmology and Neurology (RAC), Ochsner Medical Center, New Orleans, Louisiana; Department of Neurology (AD), New York University Grossman School of Medicine, New York, New York; and Departments of Ophthalmology and Neurology (KBD), University of Utah Moran Eye Center, Salt Lake City, Utah.