The Changes of Posterior Corneal Surface and High-Order Aberrations after Refractive Surgery in Moderate Myopia

• 발행기관: 대한안과학회
• 저자명: Min Joung Lee Sang Mok Lee Hyun Ju Lee Won Ryang Wee Jin Hak Lee Mee Kum Kim
• 간행물 정보: 『The Korean Journal of Ophthalmology』Vol.21 No.3, 131~136쪽, 전체 6쪽
• 주제분류: 의약학 > 의학일반
• 파일형태: PDF
• 발행일자: 2007.09.30

영문 초록

Purpose: To compare forward shift of posterior corneal surface and higher-order aberration (HOA) changes after LASIK, LASEK, and wavefront-guided LASEK surgery in moderate myopia Methods: One hundred eighty four eyes undergoing LASIK, LASEK and wavefront-guided LASEK with VISX STAR S4 were included in this study. The posterior corneal elevation was measured with Orbscan before, 2 and 4 months after surgery. Changes of the elevation were assessed using the difference map generated from preoperative and postoperative elevation maps. The values of higher-order aberrations were evaluated preoperatively and 2 months postoperatively with Wavefront aberrometer. Results: The posterior corneal surface displayed forward shift of 27.2±11.45 μm, 24.3±9.76 μm in LASIK group, 23.4±10.5 μm, 23.6±10.55 μm in LASEK group, 24.0±14.95 μm, 28.4±14.72 μm in wavefrontguided LASEK group at 2 months and 4 months, respectively. There were no statistically significant differences among those three groups, and between 2 and 4 months. The root mean score (RMS) of HOA was increased after LASIK and LASEK (p=0.000, p=0.000, respectively). The mean change of HOA-RMS was significantly smaller in wavefront-guided LASEK than LASIK or LASEK (p=0.000, p=0.000, respectively, Bonferroni-corrected). Conclusions: The changes of posterior corneal surface forward shift showed no difference among LASIK, LASEK and wavefront-guided LASEK in moderate myopia. HOAs were significantly increased after LASIK and LASEK. The changes of HOAs were significant smaller in wavefront-guided LASEK than LASIK or LASEK.

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키워드

Aberration LASEK LASIK Posterior corneal surface Wavefront-guided ablation