Corneal Topographic Asymmetry and LASIK.
- Author:
Min Kyung SHIN
1
;
Ki Yong CHOI
;
Beom Jin CHO
Author Information
1. Department of Ophthalmology, Gachon Medical school, Ghil Medical Center, Inchon, Korea.
- Publication Type:Original Article
- Keywords:
Corneal asymmetry;
LASIK;
Topography
- MeSH:
Cornea;
Humans;
Keratoconus;
Keratomileusis, Laser In Situ*;
Refractive Surgical Procedures;
Retrospective Studies;
Visual Acuity
- From:Journal of the Korean Ophthalmological Society
2001;42(9):1250-1254
- CountryRepublic of Korea
- Language:Korean
-
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.
