Dulal S, Sapkota YD. Prevalence of blindness and visual impairment and its causes among people aged 50 years and above in Karnali Zone, Nepal. Nep J Oph [Internet]. 2012 Jul. 26 [cited 2024 Nov. 22];4(2):282-7. Available from: https://nepjol.info/index.php/NEPJOPH/article/view/6545