T, I., A. K, A. A, and A. B. “PATTERN OF REFRACTIVE ERRORS AMONG ELDERLY PATIENTS IN A TERTIARY HOSPITAL IN LAGOS, NIGERIA”. ANNALS OF MEDICAL AND SURGICAL PRACTICE, Vol. 4, no. 2, Dec. 2019, pp. 134-9, https://edonmajournal.com/index.php/AMSP/article/view/121.