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要約 目的:VERION®にて術直後から翌日にかけてトーリック眼内レンズ(IOL)の回旋を測定可能かを検討した。
対象と方法:対象はトーリックIOLを挿入した30例34眼。①VERION®が投影するインプラント軸(VERION投影線),特徴的な結膜血管などと角膜中央点を結ぶ線(基準線)のなす角度。②トーリックIOL上の軸マークと基準線のなす角度。③軸マークとVERION投影線のなす角度。①〜③について,術直後と術翌日の差を求めた。
結果:VERION投影線が,術直後と比較して術翌日10°以上の差があった症例は4/34(11.8%)であった。VERION投影線と軸マークのなす角度について術直後と術翌日の差が5°未満であった症例は,全例軸マークと基準線のなす角度について術直後と術翌日の差が5°未満であった。
結論:術翌日にVERION投影線と軸マークが一致していれば,トーリックIOLは回旋していない可能性が示された。ただし,VERION投影線が術直後と術翌日で異なる位置を示す症例が存在するため,注意が必要である。
Abstract Purpose:To report the outcome of measurement of rotation after insertion of toric intraocular lens(IOL)by means of VERION®.
Cases and Method:This study was made on 34 eyes of 30 cases who received cataract surgery with insertion of toric IOL. The state of IOL rotation was measured by means of VERION® immediately after surgery and one day later. Three parameters were measured. One was the angle between the point marked on the IOL and the point of characteristic conjunctival vessel. The second was the angle between the toric mark on IOL and baseline. The third was the angle between the toric mark and the implant line of VERION®.
Findings:Angle of rotation of toric IOL differed by 10 degrees or more in 4 eyes(11.8%)and by 5 degrees or less in 30 eyes(88.2%). In all these 30 eyes, difference between the toric mark on IOL and baseline was 5 degrees or less immediately after surgery and the following day.
Conclusion:The implanted toric IOL is not rotated when the angle between the toric mark and the line of VERION® is in alignment measured on the day after surgery. Due precaution is necessary as the line of VERION® may have shifted during 24 hours after surgery.
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