Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, ON, Canada. College of Medicine, King Faisal University, Al-Ahsa, Saudi Arabia. Division of Ophthalmology, McMaster University, Hamilton, ON, Canada. The John and Liz Tory Eye Centre, Sunnybrook Health Sciences Centre, Toronto, ON, Canada. Department of Ophthalmology, University of Hong Kong, Hong Kong, Hong Kong.