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要約 目的:フェムトセカンド(FS)レーザーで異なるフラップ厚を作製して施行したLASIKの治療成績の比較。対象と方法:フラップを26眼では厚さ90μmで作製し,48眼では厚さ120μmで作製した。術後裸眼・矯正視力,矯正精度,屈折度数,高次収差増加量,コントラスト感度,合併症を評価した。結果:術後6か月の裸眼・矯正視力,矯正精度,屈折度数は両群に有意差がなく,球面収差の増加量は厚さ90μmのほうが有意に少なかった。コントラスト感度は両群で改善傾向がみられた。合併症はなかった。結論:FSレーザーを使用したフラップ厚90μmで行うLASIKは,残存角膜ベッド厚の確保に有用である。
Abstract. Purpose:To report the outcome of LASIK using corneal flap of two different thickness. Cases and Method:This study was made on 74 eyes that received LASIK by VISK STAR S4 IRTM for myopia during a 12-month period. A femtosecond laser was used to prepare the corneal flap. Its thickness was 90μm in 26 eyes and 120μm in 48 eyes. Results:There was no difference between the 2 groups regarding visual acuity with or without correction,accuracy of correction,or refraction six month after treatment. Both groups showed improved contrast sensitivity at 6 months than 1 month of treatment. Eyes treated by 90μm flap showed significantly smaller increase in spherical and spherical-like aberration. There was no complication throughout the study. Conclusion:LASIK using corneal flap of 90μm in thickness results in preservation of enough residual stromal bed and is expected to prevent complications including keratectasia.
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