Assist prof.Dr. Ali Abid Saadoon. “Refractive Errors in Thiqar Secondary Schooling Graduate ?students: Prevalence and Determinants at 2016?”. University of Thi-Qar Journal, vol. 16, no. 3, Jan. 2022, pp. 44-67, https://jutq.utq.edu.iq/index.php/main/article/view/278.