1. Noor Research Center for Ophthalmic Epidemiology, Noor Eye Hospital, Tehran, Iran
2. Department of Epidemiology, Faculty of Health, Ilam University of Medical Sciences, Ilam, Iran
3. Eye Research Center, Tehran University of Medical Sciences, Tehran, Iran
4. Refractive Errors Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
5. Noor Ophthalmology Research Center, Noor Eye Hospital, Tehran, Iran
6. Rehabilitation Research Center, Department of Optometry, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran
7. Department of Basic Sciences, School of Nursing and Midwifery, Shahid Beheshti University of Medical Sciences, Tehran, Iran