Journal Article
He, Mingguang, Amza Abdou, Kovin S Naidoo, Yuddha D Sapkota, RD Thulasiraj, Rohit Varma, Jialiang Zhao, and Leon B Ellwein.
"Prevalence and Correction of Near Vision Impairment at Seven Sites in China, India, Nepal, Niger, South Africa, and the United States." American journal of ophthalmology 154, no. 1 (2012): 107-116.