RT - Journal TY - JOUR A1 - Isyaku, Mohammed A1 - Ali, Syed A1 - Hassan, Sadiq T1 - Preoperative corneal astigmatism among adult patients with cataract in Northern Nigeria YR - 2014/12/1 JF - Indian Journal of Ophthalmology JO - Indian J Ophthalmol SP - 1094 OP - 1095 VO - 62 IS - 11 UL - https://journals.lww.com/ijo/pages/default.aspx/article.asp?issn=0301-4738;year=2014;volume=62;issue=11;spage=1094;epage=1095;aulast=Isyaku;t=5 DO - 10.4103/0301-4738.146751 N2 - The prevalence and nature of corneal astigmatism among patients with cataract has not been well-documented in the resident African population. This retrospective study was undertaken to investigate preexisting corneal astigmatism in adult patients with cataract. We analyzed keratometric readings acquired by manual Javal-Schiotz keratometry before surgery between January 1, 2011 and December 31, 2011. There were 3,169 patients (3286 eyes) aged between 16 and 110 years involved with a Male to female ratio of 1.4:1. Mean keratometry in diopters was K1 = 43.99 and K2 = 43.80. Mean corneal astigmatism was 1.16 diopter and a majority (45.92%) of eyes had astigmatism between 1.00 and 1.99 diopters. Two-thirds of the eyes (66.9%) in this study had preoperative corneal astigmatism equal to or above 1.00 diopter. Findings will help local cataract surgeons to estimate the potential demand for toric intraocular lenses. ER -