Kamaladasa, S.Subasinghe, Z.Nanayakkara, S.F.R.Fernando, D.J.S.2016-01-142016-01-141995The Ceylon Medical Journal, 40(2)pp.83https://dl.nsf.gov.lk/handle/1/20755Medical SciencesOphthalmologyPreventive medicineBlindnessArticle