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75歳の生来健康な男性の右眼の白内障に嚢外摘出術およびin the bagでの後房レンズ挿入術を施行した所,術前,術中には特に異常な所見は認めなかったが,手術の翌日にミドリンP® ,1%アトロピン点眼後に虹彩の極大散瞳を来し,その後,各種の縮瞳薬にも反応せず,1年を経過しても虹彩の状態は散瞳のままであった.
1年後,同一例の左眼を同一術者が同一の術式で,同タイプの後房レンズを挿入したが,散・縮瞳薬に良く反応して,瞳孔の異常は認められなかった.
右眼と左眼の手術を比較検討したが,使用薬剤,手術器具等に不可逆性散瞳の原因を見出す事はできなかった.
A 75-year-old, otherwise healthy male underwent extracapsular cataract extraction and posterior cham-ber intraocular lens implantation surgery in his right eye. Mixture of mydriatic solution was instilled the next day, which resulted in persistent to maximal pupil-lary dilatation, non-responsive to any miotics.
One year later, his left eye was operated by the same surgeon, with the same procedure and the same intraocular lens as the previous one. This time, the pupil of the left eye responded well to mydriatics and miotics. No causative factor could be identified responsible for the irreversible mydriasis in the right eye.
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