1. World Health Organisation (2022) Blindness and Vision Impairment. https://www.who.int/news-room/fact-sheets/detail/blindness-and-visual-impairment
2. VISION 2020: The Right to Sight
3. Smartphone-based screening for visual impairment in Kenyan school children: a cluster randomised controlled trial
4. Blindness in Iraq: Leading causes, target patients, and barriers to treatment
5. Kalikivayi, V., Naduvilath, T.J., Bansal, A.K. and Dandona, L. (1997) Visual Impairment in School Children in Southern India. Indian Journal of Ophthalmology, 45, 129-134. https://www.ijo.in/article.asp?issn=0301-4738;year=1997;volume=45;issue=2;spage=129;epage=134;aulast=Kalikivayi