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.
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| http://dx.doi.org/10.1016/j.jcrs.2014.09.043 | DOI Listing |
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