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白内障手術後に,単純型糖尿病性網膜症が著しく増悪した4例5眼を報告した.増悪は以下の特徴を有する.(1)増悪は術後1〜2カ月で始まることが多く,著しい網膜浮腫や大型の黄色浸出斑が後極部網膜に発生する.(2)浸出斑や浮腫の吸収は術後6〜8カ月で始まって10〜20カ月でほぼ終了し,症状は固定状態となる.(3)増悪期の症状が強かったものは殆んど視力が回復せず,0.04以下に終わる.網膜症増悪の原因としては,白内障手術後に生じる後部硝子体剥離や硝子体の前方への移動による網膜への刺激が考えられ,これにはプロスタグランディンも関与している可能性がある.
糖尿病性網膜症を有する場合の白内障手術の手術術式は,嚢外法が嚢内法に比べて優れていると考えられる.
Five eyes in 4 patients with simple diabetic re-tinopathy showed marked progression after intra-capsular extraction (4 eyes) and phacoemulsifica-tion-aspiration (1 eye). The aggravation of retino-pathy became apparent 1 to 2 months after surgery in the form of marked retinal edema and large yellowish exudates in the macula. These lesions showed spontaneous absorption, starting 6 to 8 months after surgery and completing 10 to 20 mon-ths after surgery. The final visual acuity of 4 of these 5 eyes were less than 0.04.
These retinal changes were thought to be the consequence of retinal traction by the vitreous during the post-operative period. Planned extraca-psular cataract surgery is advocated for patients with diabetic retinopathy in preference to intraca-psular one.
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