Chukwuka, Ireju Onyinye, and Chinyere Nnenne Pedro-Egbe. “Demographic Pattern of Refractive Anomalies in Niger Delta Presbyopes - Implications for Preventive Eye Care Practice”. International Journal of Clinical and Experimental Ophthalmology 4, no. 1 (January 29, 2020): 005–008. Accessed December 28, 2025. https://www.clinophthaljournal.com/index.php/ijceo/article/view/ijceo-aid1025.