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