Nkeremuzor, E. C., N. C. Ikoro, E. C. Esenwah, C. Nzotta, G. I. Ugwuoke, O. M. Nwaigwe, and U. C. Ogbonna. “Determination of Luminance Levels of Visual Acuity Charts in Selected Eye Clinics in Owerri and Their Effects on Vision”. Asian Journal of Research and Reports in Ophthalmology 3, no. 2 (May 6, 2020): 13-23. Accessed September 20, 2021. https://journalajrrop.com/index.php/AJRROP/article/view/30108.