1. Shri Bhagwan Mahavir Vitreoretinal Services, Sankara Nethralaya, Chennai 600006, India
2. Department of Optometry, Medical Research Foundation, Chennai 600040, India
3. Department of Instrumentation and Control Engineering, National Institute of Technology, Tiruchirappalli 620015, India
4. Theoretical and Experimental Epistemology Lab, School of Optometry and Vision Science, University of Waterloo, Waterloo, ON N2L 3G1, Canada