Clinical Result of Wavefront-guided Corneal Ablation: LASIK vs. LASEK.

Kim, Yun Taek; Chung, Eui Sang

Original Article

Journal of the Korean Ophthalmological Society 2005;46(7):1114-1120.
Published online July 31, 2005.

Clinical Result of Wavefront-guided Corneal Ablation: LASIK vs. LASEK.

Department of Ophthalmology, Samsung Medical Center Sungkyunkwan University, School of Medicine, Seoul, Korea. eschung@smc.samsung.co.kr

웨이브프론트를 이용한 라식과 라섹의 임상 결과 비교

김윤택,정의상

Department of Ophthalmology, Samsung Medical Center Sungkyunkwan University, School of Medicine, Seoul, Korea

Correspondence: Yun-Taek Kim, M.D.

Abstract

PURPOSE
To evaluate the 6-month refractive outcomes of wavefront-guided myopic laser in situ keratomileusis (LASIK) versus laser subepithelial keratomileusis (LASEK). METHODS: This observational case study comprised 35 eyes of 18 patients in the wavefront-guided LASIK group and 27 eyes of 14 patients in the LASEK group. Preoperative and postoperative wavefront analysis was performed with the Hartmann-Shack based Wavescan(R) aberrometer (VISX, Santa Clara, CA) and corneal ablation was performed using STAR S4 excimer laser ablation. The efficacy, predictability and higher-order aberrations (HOAs) were evaluated. RESULTS: Six months after surgery, the mean logMAR UCVA was -0.16 and -0.15. The mean postoperative spherical equivalent was -0.00+/-0.18D and -0.01+/-0.14D. The predictability was 97% and 100%. The efficacy index was 1.40 and 1.39 in the LASIK and LASEK groups, respectively. In comparison of HOA, there was no significant difference between the 2 groups except for the trefoil aberration. Vector analysis showed no difference of the coma aberration in the 2 groups. There was no significant difference in subjective satisfaction. CONCLUSIONS: Both wavefront-guided LASIK and LASEK are effective and predictable for correction of myopic astigmatism. Comparing LASIK and LASEK, there were no significant differences in the change of HOAs except for trefoil.

Key Words: Aberration;Coma;LASEK;LASIK;Wavefront