Radial Keratotomy後のレーザー角膜屈折矯正手術症例

Laser vision correction for refractive error after previous radial keratotomy

要約　目的：RK後の残余屈折誤差に対するLVC治療症例の臨床結果の報告。対象・方法：RK後眼に施行したPRK2例4眼，LASIK4例7眼。年齢26～51歳（平均37.5歳）で，男性5例，女性1例。LVCは通常通りに施行した。結果：術後の裸眼視力は0.8～1.5（平均1.24），MRSEは－0.75～＋2.00D（平均＋0.05±0.70D）で，全症例で視力，屈折誤差に改善が得られた。術後に上皮迷入が3眼発生し，2眼はステロイド点眼薬，1眼は外科的除去した。結論：RK後のLVCは有用な治療法であるが，RK後眼の特異性による合併症が起こることがある。

Abstract.　Purpose：To evaluate the efficacy of additional laser vision correction（LVC）for the residual refractive error after radial keratotomy（RK）. Cases and Methods：Four eyes of two cases and seven eyes of four cases, who had previous RK, underwent photorefractive keratectomy and laser in situ keratomileusis, respectively. Patients, five men and one woman, ranged in age from 26 to 51 years old and the mean age was 37.5 years. LVC was performed as usual. Results：The mean uncorrected visual acuity after the surgery was 1.24（range, 0.8～1.5）. Manifest refraction spherical equivalent（MRSE）was＋0.05＋/－0.70D（range, －0.75～＋2.00D）. Visual acuity and residual refractive error improved in all eyes. Epithelial ingrowth was observed in three eyes. Two of them were treated effectively by steroid eye drops and one eye required surgical removal. Conclusion：LVC is effective in treating refractive error after RK. However it carries the risk of characterized complications due to previous RK.