1. Wilkinson CP, Hinton DR, Sadda SR, Wiedemann P. Ryans Retina, Volume – II. 6th ed. China: Elsevier; 2018.
2. GBD 2019 Blindness and Vision Impairment Collaborators; Vision Loss Expert Group of the Global Burden of Disease Study. 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. Erratum in: Lancet Glob Health 2021;9:e408.
3. ; IDF Diabetes Atlas Committee.Global and regional diabetes prevalence estimates for 2019 and projections for 2030 and 2045: Results from the International Diabetes Federation Diabetes Atlas, 9th edition;Saeedi;Diabetes Res Clin Pract,2019
4. Prevalence and trends of the diabetes epidemic in urban and rural India: A pooled systematic review and meta-analysis of 1.7 million adults;Ranasinghe;Ann Epidemiol,2021
5. Epidemiology of type 2 diabetes in India;Pradeepa;Indian J Ophthalmol,2021