1. From the Neuro-ophthalmology Service, Department of Ophthalmology, and the
2. Neuro-ophthalmology Unit, Cullen Eye Institute, University of Baylor, Houston, Texas; and the
3. Neuro-ophthalmogy Service, Wills Eye Hospital, Philadelphia, Pennsylvania.
4. Clinical Trials Research Unit, School of Population Health, University of Auckland, Auckland, New Zealand; the