1. World Health Organization. International Statistical Classification of diseases and related health problems - 11th revision [Internet]. 2019. Available from: https://icd.who.int/browse11/l-m/en#/http%3A%2F%2Fid.who.int%2Ficd%2Fentity%2F1103667651
2. World Health Organisation. International statistical classification of diseases and related health problems - 10th revision. 2010.
3. Bourne RRA, Steinmetz JD, Saylan M, Mersha AM, Weldemariam AH, Wondmeneh TG, et al. Causes of blindness and vision impairment in 2020 and trends over 30 years, and prevalence of avoidable blindness in relation to VISION 2020: The Right to Sight: An analysis for the Global Burden of Disease Study. Lancet Glob Health. 2021;9:e144–60.
4. Kilangalanga NJ, Nsiangani LN, Dilu AA, Moanda KA, Ilunga MJ, Makwanga ME, et al. Epidemiology of Childhood Blindness and Low Vision in Kinshasa–democratic Republic of the Congo. Ophthalmic Epidemiol. 2020;27:45–51.
5. Atowa UC, Hansraj R, Wajuihian SO. Visual problems: A review of prevalence studies on visual impairment in school-age children. Int J Ophthalmol. 2019;12:1037–43.