Vivekanand, Rajvanth Valtati, Geeta Chintakayala, Praveen Kumar, and Chakrapani Chatla. 2020. “Early Detection of Diabetic Retinopathy through Active Screening of Out-Patients at ESI Facility in Hyderabad: Active Screening for Diabetic Retinopathy at ESI”. National Journal of Research in Community Medicine 9 (2):90-95. https://www.journal.njrcm.com/index.php/njrcm/article/view/138.