エキシマレーザーによる乱視矯正術

Astigmatic keratectomy by excimer laser

　エキシマレーザーによる角膜乱視矯正術を行つた14眼を検索した。手術既往のない自然乱視9眼と，白内障手術後の乱視5眼である。乱視の平均値は，自然乱視群で−4.72±1.09D，術後乱視群で−3.45±0.72Dであり，術後6か月で，それぞれ−1.56±0.99D，−0.80±1.15Dになった。乱視の矯正値は，前者で67％，後者で75％であった。両者間に有意差はなかった。矯正視力が2段階以上低下したものはなく，本治療は安全であると評価された。

We reviewed 14 astigmatic eyes treated by excimer laser keratectomy. The series comprised 9 eyes of idiopathic astigmatism and 5 eyes following cataract surgery. The initial amount of astigmatism averaged -4.72 ± 1.09 D in the former group and -3.45 ± 0.72 D in the latter. At 6 months after treatment, the amount of astigmatism averaged -1.56 ± 0.99 D in the former group and -0.80± 1.15 D in the latter. The amount of astigmatism had improved by 67% in the former group and by 75% in the latter. There was no significant dif-ference in the amount of astigmatic correction between the two groups. There was no instance of loss of corrected visual acuity by 2 lines or more in the whole series.