1 Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada.
2 Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, Ontario, Canada; Prism Eye Institute, Mississauga, Ontario, Canada.
3 Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, Ontario, Canada; Prism Eye Institute, Mississauga, Ontario, Canada; Department of Ophthalmology, Trillium Health Partners, Mississauga, Ontario, Canada. Electronic address: ike.ahmed@utoronto.ca.