Nelson, Vincy, Girija Viswanathan, and Sony Simon. “Prevalence and Determinants of Refractive Errors Among School Children of 5th –10th Standard: A Study from South Kerala”. National Journal of Community Medicine 9, no. 11 (November 30, 2018): 813–818. Accessed May 1, 2025. https://www.njcmindia.com/index.php/file/article/view/824.