J Korean Ophthalmol Soc > Volume 50(4); 2009 > Article
Journal of the Korean Ophthalmological Society 2009;50(4):518-522.
DOI: https://doi.org/10.3341/jkos.2009.50.4.518    Published online April 30, 2009.
Changes of the Corneal Aberration Following Cataract Surgery.
Hyun Cheol Oh, Dong Jun Lee, Woo Chan Park
Department of Ophthalmology, Dong-A University College of Medicine Korea, Busan, Korea. wcpark@dau.ac.kr
백내장 수술에 의한 각막수차의 변화
오현철ㆍ이동준ㆍ박우찬
Department of Ophthalmology, Dong-A University College of Medicine Korea, Busan, Korea
Abstract
PURPOSE
To assess the changes of corneal aberration in the front and rear surface measured by Pentacam(R) following cataract surgery. METHODS: Thirty-two eyes of 30 consecutive patients that underwent phacoemulsification and IOL insertion via 3 mm superotemporal corneoscleral incision were examined. The corneal aberration was measured with Pentacam(R) (Oculus, Wetzlar, Germany) at 1 week and 1 month after the surgery, and these postoperative values were compared with values taken before the operation. The data were analyzed from 6 mm pupil size, using Zernike's polynomial expansion. RESULTS: In anterior corneal aberration, Z (4, -2); secondary astigmatism at 1 week postoperatively and Z (3, -3); the trefoil at 1 month postoperatively changed significantly (p<0.05). By contrast, in posterior corneal aberration, Z (2, -2), Z (2, 0), Z (2, 2), Z (3, 1), Z (4, -4), and Z (4, -2) changed significantly (p<0.05). However, there were no significant changes at 1 month postoperatively (Paired t-test). CONCLUSIONS: There were significant changes in posterior corneal aberration compared to anterior corneal aberration at 1 week postoperatively. However, the corneal aberration recovered to the preoperative level at one month after the operation. Presumably, these results might be due to the corneal edema of the incision site, caused by measuring the corneal thickness in the early phase of surgery.
Key Words: Corneal aberration;Pentacam;Phacoemulsification;Zernike polynomial


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