| Surface Ablation with 0.02% Mitomycin C for Retreatment after LASIK and LASEK. |
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Kang Yoon Kim, Hong Seok Kim, Ji Won Jung, Hyung Keun Lee, Kyoung Yul Seo, Eung Kweon Kim, Tae Im Kim |
1The Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea. TIKIM@yuhs.ac
2Siloam Eye Hospital, Seoul, Korea. |
| 굴절수술 후 잔여 근시에 대한 보강수술로서 각막표면연마굴절수술과 마이토마이신의 효과 |
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김강윤1⋅김홍석2⋅정지원1⋅이형근1⋅서경률1⋅김응권1⋅김태임1 |
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연세대학교 의과대학 안과학교실 시기능개발연구소1, 실로암안과병원2 |
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Received: 29 January 2015 • Revised: 26 February 2015 • Accepted: 4 June 2015 |
| Abstract |
PURPOSE
To evaluate the efficacy and safety of surface ablation with mitomycin C (MMC) for the retreatment of refractive errors following laser-assisted in-situ keratomileusis (LASIK) and laser-assisted sub-epithelial keratectomy (LASEK). METHODS: In this retrospective clinical study conducted at a single center, we evaluated 23 eyes that received surface ablation with MMC (0.02%, 20 seconds) between 2009 and 2013 for the treatment of residual refractive errors following myopic LASIK and LASEK. All eyes were evaluated for corneal thickness, initial refractive error, time interval to retreatment, amount of retreatment, duration of postoperative topical steroids use as well as uncorrected vision, spherical equivalent and corneal haziness preoperatively and 1, 3, 6 and 12 months postoperatively. RESULTS: Initially corrected myopia in the LASIK group was -6.47 +/- 2.17 D and -5.68 +/- 2.51 D in the LASEK group. Mean time between initial and retreatment by surface ablation was 11.88 +/- 5.59 months for LASIK and 14.07 +/- 10.10 for LASEK. Retreat amount was 1.49 +/- 0.36 D after LASIK and -1.65 +/- 0.41 D after LASEK. At postoperative 12 months, uncorrected visions were -0.061 +/- 0.886 (log MAR) in the LASIK group and -0.004 +/- 0.745 (log MAR) in the LASEK group and spherical equivalents were -0.55 +/- 0.56 D in the LASIK group and 0.36 +/- 0.33 D in the LASEK group. Postoperative hazes developed in 1 of 8 LASIK eyes and 3 of 15 LASEK eyes which resolved with application of topical steroid for 2-3 months postoperatively. CONCLUSIONS: Surface ablation with 0.02% MMC is safe and highly effective for treating myopic regression following LASIK or LASEK. Application of 0.02% MMC for 20 seconds was effective in preventing postoperative haze formation and maintaining stable vision and spherical equivalent at 12 months after retreatment. |
| Key Words:
LASEK;LASIK;Mitomycin C;Retreatment;Surface ablation |
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