Eun-hye Oh1, Hyojin Kim1, Hyun Soo Lee1, Kyu-yeon Hwang1, Choun-Ki Joo2. 1. From the Catholic Institute for Visual Science (Oh, Joo), College of Medicine, Catholic University of Korea, the Department of Visual Optics (Kim), Baekseok University, Cheonan, and the Department of Ophthalmology and Visual Science (Lee, Hwang, Joo), Seoul St. Mary's Hospital, College of Medicine, Catholic University of Korea, Seoul, South Korea. 2. From the Catholic Institute for Visual Science (Oh, Joo), College of Medicine, Catholic University of Korea, the Department of Visual Optics (Kim), Baekseok University, Cheonan, and the Department of Ophthalmology and Visual Science (Lee, Hwang, Joo), Seoul St. Mary's Hospital, College of Medicine, Catholic University of Korea, Seoul, South Korea. Electronic address: ckjoo@catholic.ac.kr.
Abstract
PURPOSE: To analyze the pattern of anterior corneal astigmatism before cataract surgery in Korean patients using power vector analysis and to assess the effect of aging on astigmatism. SETTING: Seoul St. Mary's Hospital, Catholic University of Korea, Seoul, South Korea. DESIGN: Cross-sectional retrospective study. METHODS: The study evaluated eyes with cataract from May 1, 2009, to July 1, 2013. All eyes received a complete ophthalmologic examination and manual keratometer measurement (OM-4) preoperatively. Power vector J0 and linear regression analyses were used to assess the association between age and anterior corneal astigmatism. RESULTS: The study evaluated 2847 right eyes (2847 patients). The mean age of the patients was 66.64 years ± 12.06 (SD) (range 20 to 100 years); 64.2% of the patients were women. The corneal J0 vector values became progressively negative and trended toward against-the-rule (ATR) astigmatism with increasing age (for men, r = -0.388 and P < .001; for women, r = -0.348 and P < .001). The ATR shift occurred earlier in men than in women. The regression coefficient of J0 values analyzed by age was -0.014 in men and -0.015 in women (both P < .001). CONCLUSIONS: Anterior corneal astigmatism in Korean patients with cataract shifted with age from with-the-rule to ATR in both sexes. FINANCIAL DISCLOSURE: No author has a financial or proprietary interest in any material or method mentioned.
PURPOSE: To analyze the pattern of anterior corneal astigmatism before cataract surgery in Korean patients using power vector analysis and to assess the effect of aging on astigmatism. SETTING: Seoul St. Mary's Hospital, Catholic University of Korea, Seoul, South Korea. DESIGN: Cross-sectional retrospective study. METHODS: The study evaluated eyes with cataract from May 1, 2009, to July 1, 2013. All eyes received a complete ophthalmologic examination and manual keratometer measurement (OM-4) preoperatively. Power vector J0 and linear regression analyses were used to assess the association between age and anterior corneal astigmatism. RESULTS: The study evaluated 2847 right eyes (2847 patients). The mean age of the patients was 66.64 years ± 12.06 (SD) (range 20 to 100 years); 64.2% of the patients were women. The corneal J0 vector values became progressively negative and trended toward against-the-rule (ATR) astigmatism with increasing age (for men, r = -0.388 and P < .001; for women, r = -0.348 and P < .001). The ATR shift occurred earlier in men than in women. The regression coefficient of J0 values analyzed by age was -0.014 in men and -0.015 in women (both P < .001). CONCLUSIONS:Anterior corneal astigmatism in Korean patients with cataract shifted with age from with-the-rule to ATR in both sexes. FINANCIAL DISCLOSURE: No author has a financial or proprietary interest in any material or method mentioned.