1. Noor Ophthalmology Research Center; Noor Eye Hospital; Tehran Iran
2. Department of Optometry; Tehran University of Medical Sciences; Tehran Iran
3. Refractive Errors Research Center; School of Paramedical Sciences; Mashhad University of Medical Sciences; Mashhad Iran
4. Department of Optometry; School of Paramedical Sciences; Mashhad University of Medical Sciences; Mashhad Iran
5. Dezful University of Medical Sciences; Dezful Iran
6. Department of Epidemiology; School of Public Health; Shahid Beheshti University of Medical Sciences; Tehran Iran