1. Noor Research Center for Ophthalmic Epidemiology, Noor Eye Hospital, Tehran, Iran
2. Rehabilitation Research Center, Department of Optometry, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran
3. Department of Medical Surgical Nursing, School of Nursing and Midwifery, Shahid Beheshti University of Medical Sciences, Tehran, Iran
4. Ophthalmic Epidemiology Research Center, Shahroud University of Medical Sciences, Shahroud, Iran
5. Refractive Errors Research Center, School of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran
6. Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran