1. Department of Optometry, Mashhad University of Medical Sciences, Mashhad, Iran
2. Noor Research Center for Ophthalmic Epidemiology, Noor Eye Hospital, Tehran, Iran
3. Department of Optometry, Iran University of Medical Sciences, Tehran, Iran
4. Noor Ophthalmology Research Center, Noor Eye Hospital, Tehran, Iran
5. Refractive Errors Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
6. Department of Medical Surgical Nursing, Shahid Beheshti University of Medical Sciences, Tehran, Iran