トーリック眼内レンズ挿入眼の術後短期成績

Short-term outcome after insertion of toric intraocular lens

要約　目的：角膜乱視がある白内障に手術を行い，トーリック眼内レンズを挿入した短期成績の報告。対象と方法：48例70眼にトーリック眼内レンズSN6AT3，4，5を挿入し，3か月以上の経過を追った。結果：術前の角膜乱視は，SN6AT3挿入の24眼では0.96±0.47D，AT4挿入の26眼では1.25±0.35D，AT5挿入の20眼では2.28±0.61Dであり，術後はそれぞれ1.16±0.53D，1.35±0.42D，2.2±0.91Dで変化がなかった。術後の自覚的屈折はそれぞれ0.64±0.57D，0.76±0.52D，1.05±0.71Dで，いずれも術後の角膜乱視よりも有意に小さかった。結論：トーリック眼内レンズには角膜乱視の矯正効果があり，白内障術後の視機能の改善に有効と思われる。

Abstract.　Purpose：To report a short-term outcome of cataract surgery with insertion of toric intraocular lens. Cases and Method：Cataract surgery was performed on 70 eyes of 48 patients with insertion of toric intraocular lens SN6AT3,4 or 5. Cases were followed up for 3 months or longer. Results：Corneal astigmatism before surgery averaged 0.96±0.47D in 24 eyes inserted with SN6AT3,1.25±0.35D in 26 eyes inserted with AT4,and 2.28±0.61D in 20 eyes inserted with AT5. It averaged,respectively 1.16±0.53D,1.35±0.42D and 2.2±0.91D after surgery. There were no differences between pre-and postsurgical values. Subjective total astigmatism averaged,respectively,0.64±0.57D,0.76±0.52D and 1.05±0.71D after surgery. The values were significantly smaller than those of corneal astigmatism after surgery. Conclusion：Toric intraocular lens promises to reduce total astigmatism in eyes with corneal astigmatism.