Luthra, Megha, et al. “Prevalence and Determinants of Age Related Macular Degeneration in North Indian City of Dehradun, Uttarakhand”. Indian Journal of Community Health, vol. 26, no. 3, Sept. 2014, pp. 292-4, https://iapsmupuk.org/journal/index.php/IJCH/article/view/424.