1. Department of Optometry and Vision Science, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia,
2. School of Optometry and Vision Science, University of Waterloo, Waterloo, Canada,
3. Sun Life Financial Movement Disorders Research and Rehabilitation Center, Department of Kinesiology and Physical Education, Faculty of Science, Wilfrid Laurier University, Waterloo, Canada,