1 From the Department of Ophthalmology and Vision Sciences (L.D., E.M.), University of Toronto; and Department of Medicine (R.T.M., J.D.S., E.M.), Division of Neurology, University of Toronto, Ontario, Canada.
2 From the Department of Ophthalmology and Vision Sciences (L.D., E.M.), University of Toronto; and Department of Medicine (R.T.M., J.D.S., E.M.), Division of Neurology, University of Toronto, Ontario, Canada. [email protected].