1 Department of Ophthalmology, The Methodist Hospital, Houston, Texas, Departments of Ophthalmology, Neurology, and Neurosurgery, Weill Cornell Medical College, Houston, Texas The University of Texas Medical School at Houston, Houston, Texas Department of Radiology, The Methodist Hospital, Houston, Texas, Department of Radiology, Weill Cornell Medical College, Houston, Texas Department of Radiology, The Methodist Hospital, Houston, Texas, Department of Radiology, Weill Cornell Medical College, Houston, Texas, The University of Texas Medical School at Houston, Houston, Texas, Department of Ophthalmology, The University of Iowa Hospitals and Clinics, Iowa City, Iowa, Department of Ophthalmology, The University of Texas Medical Branch, Galveston, Texas, aglee@tmhs.org.