1 John P. and Kathrine G. McGovern Medical School (BUR, AVR), The University of Texas Health Science Center at Houston, Houston, Texas; Ruiz Department of Ophthalmology and Visual Science (NH, OOA), McGovern Medical School at the University of Texas Health Science Center at Houston, Houston, Texas; Robert Cizik Eye Clinic (NH, OOA), Houston, Texas; Department of Neurology (NH, OOA), McGovern Medical School at the University of Texas Health Science Center at Houston, Houston, Texas; Department of Ophthalmology and Visual Sciences (BJK, EC, MDS, RPH), John A Moran Eye Center, University of Utah Health Sciences Center, Salt Lake City, Utah; and Department of Neurology (BJK, EC, MDS), University of Utah Health Sciences Center, Salt Lake City, Utah.