強度角膜乱視白内障眼に対する乱視矯正眼内レンズの術後成績

Clinical results of toric intraocular lens implantation for cataract with high astigmatism

要約　目的：強度角膜乱視白内障眼に対する乱視矯正眼内レンズ（TIOL，Alcon社製）の術後成績の報告。対象と方法：強度角膜乱視白内障眼にTIOL（SN6AT6：12眼，SN6AT7：8眼，SN6AT8：3眼，SN6AT9：1眼）を挿入し，術後1か月以上経過観察できた22例24眼（平均年齢68.1歳）である。術前と術後1か月の視力（裸眼・矯正），角膜乱視，自覚屈折，軸回旋誤差を後方視的に検討した。結果：視力（矯正・裸眼）と自覚乱視は術後1か月で有意（p＜0.001）に改善した。角膜乱視に有意差はなかった。TIOLの軸回旋誤差は2.8°であった。結論：TIOLは強度乱視白内障眼の乱視矯正に有効である。

Abstract.　Purpose：To evaluate the postoperative outcome of toric intraocular lens（TIOL）implantation for cataract patients with high corneal astigmatism. Methods：This retrospective study included 24 eyes of 22 patients with high corneal astigmatism exceeded-1.50 D who underwent cataract surgery and implantation of TIOL（SN6AT6：12 eyes, SN6AT7：8 eyes, SN6AT8：3 eyes, SN6AT9：1 eye）. The mean age of all cases was 68.1 years. Visual acuity, corneal astigmatism, subjective refraction, and rotation error were recorded preoperatively and 1 month postoperatively. Results：The uncorrected and correted distance visual acuities and subjective refraction were significantly（p＜0.001）improved after TIOL implantation. There was no significant difference in corneal astigmatism between preoperatively and postoperatively. The mean rotation error was 2.8°. Conclusion：TIOL was effective for cataract patients with high corneal astigmatism.