Corneal Topographic Asymmetry and LASIK.

Shin, Min Kyung; Choi, Ki Yong; Cho, Beom Jin

Original Article

Journal of the Korean Ophthalmological Society 2001;42(9):1250-1254.
Published online September 1, 2001.

Corneal Topographic Asymmetry and LASIK.

Min Kyung Shin, Ki Yong Choi, Beom Jin Cho

¹Department of Ophthalmology, Gachon Medical school, Ghil Medical Center, Inchon, Korea.
²Bupyong Chung Ophthalmology Hospital, Inchon, Korea.
³Department of Ophthalmology, University of Ulsan, College of Medicine, Asan Medical Center, Seoul, Korea.

각막형태검사상 비대칭을 보이는 환자에서의 라식결과

조범진(Beom Jin Cho),신민경(Min Kyung Shin),최기용(Ki Yong Choi)

Abstract

PURPOSE
The cornea of the keratoconus patient that is one of the contraindications in refractive surgery shows severe topographic asymmetry and the lower curvature is much steeper than the upper one. In this study, we evaluated whether the mild to moderate topographic asymmetry which does not fall under the Rabinowitz-McDonnell's keratoconus criteria(I-S value>3.0 D) would affect the LASIK results. METHODS: The maximal diopter difference in central 3 mm-zone(MDD-3) of the pre-LASIK topography, the postoperative best uncorrected visual acuity(UCVA) and the postoperative best corrected visual acuity(BCVA) were analyzed in 248 eyes of 124 patients retrospectively. We divided the patients into 2 groups according to the magnitude of MDD-3(MDD-3<1.0 D in group 1 and MDD-3> OR =1.0 D in group 2). In the same manner, the patients were divided into 2 groups according to the magnitude of MDD-5(MDD-5<1.0 D in group A and MDD-5> OR =1.0 D in group B) using 5 mm-zone. RESULTS: Between group 1 and 2, statistically significant difference was not observed in postoperative UCVA and BCVA(p>0.05). Between group A and B, statistically significant difference was not observed in postoperative UCVA and BCVA(p>0.05), either. CONCLUSIONS: This suggests that the mild pre-LASIK topographic asymmetry would not affect the visual acuity after LASIK.

Key Words: Corneal asymmetry;LASIK;Topography