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要約 目的:エキシマレーザーによる治療的角膜切除術(PTK)の成績の報告。対象と方法:過去10年間に当院でPTKを実施し,1年以上の経過観察ができた51例69眼を対象とした。男性23眼,女性46眼で,PTK実施時の年齢は57~88歳(平均71歳)である。矯正視力,屈折,角膜厚を検索した。結果:原因疾患は,Avellino角膜ジストロフィ45眼,帯状角膜変性20眼,角膜白斑4眼であった。1年後の視力は42眼(61%)で改善した。視力改善は,Avellino角膜ジストロフィと角膜白斑で有意であった。角膜切除後に遠視化が生じた。結論:エキシマレーザーによるPTKは角膜表層疾患の治療に有効である。
Abstract. Purpose:To report the outcome of excimer laser phototherapeutic keratectomy(PTK). Cases and Method:This retrospective study was made on 69 eyes of 51 patients who received PTK during the past 10 years and who could be followed up for one year or over. The series comprised 23 male and 46 female eyes. They were aged 57 to 88 years,average 71 years,at the time of surgery. They were reviewed regarding best-corrected visual acuity(BCVA),refraction,and corneal thickness. Results:PTK was performed for Avellino corneal dystrophy in 45 eyes,band keratopathy in 20 eyes,and corneal leukoma in 4 eyes. BCVA improved in 42 eyes(61%)one year later. Improvement in BCVA was significant in eyes with Avellino corneal dystrophy and corneal leukoma. Refraction shifted towards hyperopia after keratectomy. Conclusion:Excimer laser PTK is effective for corneal lesions involving the anterior layers.
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