1. Noor Research Center for Ophthalmic Epidemiology, Noor Eye Hospital, Tehran
2. Department of Epidemiology, Faculty of Health, Ilam University of Medical Sciences, Ilam
3. Department of rehabilitation science, School of Allied Medical Sciences, Mazandaran University of Medical Sciences, Sari
4. Refractive Errors Research Center, Mashhad University of Medical Sciences, Mashhad
5. Eye Research Center, Tehran University of Medical Sciences, Tehran
6. Department of Pediatrics, Dezful University of Medical Sciences, Dezful
7. Department of Optometry, Shahid Beheshti University of Medical Sciences, Tehran
8. Department of Medical Surgical Nursing, School of Nursing and Midwifery, Shahid Beheshti University of Medical Sciences, Tehran