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