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要約 目的:最近使用可能となったトーリック眼内レンズ(IOL)術後の軸ずれを後ろ向きに評価した。
方法:2017年11月〜2021年12月の期間に,同一の術前検査,術者,手術,術後検査下で水晶体再建術を施行し,XY1AT3-7(HOYA,XY1),ZCW150/225/300/375(Johnson & Johnson Surgical Vision,ZCW),SN6AT3-9(Alcon,SN)が挿入された各70眼を対象とした。IOLの軸位置はサージカルガイダンスを用いて決め,術翌日のIOL軸マーカー位置の回転と目標軸位置との差(絶対値)を算出し,比較検討した。
結果:平均軸ずれ量は,XY1群が4.5±4.8°,ZCW群が3.0±2.2°,SN群が2.4±1.7°と,XY1群はSN群より大きかった(p=0.016)。また,10°以上の症例はそれぞれ7眼,1眼,0眼であった。
結論:ZCW群とSN群は,XY1群に比べて軸ずれが少なかった。ZCW群は,支持部の摺りガラス形状が軸ずれへの抑制に有効であることが示唆された。SN群の軸ずれが最も少なく,高度な軸ずれもなかった。
Abstract Purpose:To retrospectively evaluate axial misalignments in the use of new types of toric intraocular lenses(IOLs).
Methods:XY1AT3-7(HOYA, group XY1), ZCW150/225/300/375(Johnson & Johnson Surgical Vision, group ZCW), and SN6AT3-9(Alcon, group SN)were implanted in 70 eyes during cataract surgery performed in the period between November 2017 and December 2021, under the same examinations, surgeon, and surgical procedure. Axial positions of the IOLs were aligned using a guiding system, and absolute difference between the intended and postoperative positions were measured and compared between the groups.
Results:Mean misalignments were 4.5±4.8 degrees, 3.0±2.2 degrees, and 2.4±1.7 degrees in the groups of XY1, ZCW, and SN, respectively, and the misalignments of XY1 were larger than those of SN(p=0.016). There were 7, 1, and 0 eyes with misalignments of 10 degree or more, respectively.
Conclusion:Misalignments in the ZCW and SN groups were lesser than in the XY1 group. The haptic exploration of ground surfaces of ZCW group IOLs were demonstrated to be effective in reducing misalignment compared with the previous model. The SN group IOLs resulted in the least misalignment with no record of high misalignment.
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