增生性糖尿病视网膜病变（proliferative diabetic retinopathy PDR）是糖尿病人主要致盲原因，大多需做玻璃体切割术及网膜复位术，此项手术具有难度大,眼内操作时间长,组织损伤重等特点。
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Objective To analyse the risk factors of the postoperative iris neovascularization(INV) of proliferative diabetic retinopathy(PDR) patients treated by vitreoretinal surgeries.
目的探讨增殖型糖尿病视网膜病变（PDR）行玻璃体手术后，虹膜红变（INV）发生的危险因素。
Results in all the patients, 50 cases (48.1%) were caused by proliferative diabetic retinopathy (PDR) and 34 cases by retinal vein occlusion (RVO) (32.7%).
结果在所有患者中，增生性糖尿病性视网膜病变50例(48.1%)，视网膜静脉阻塞34例(32.7%)。
Results: The DR incidence was 40.8% in 304 NIDDM patients, the background diabetic retinopathy (BDR) incidence was higher than that of proliferative diabetic retinopathy (PDR).
结果：本组NIDDM患者中DR总发生率为40．8％，其中单纯型视网膜病变（BDR）发生率高于增殖型视网膜病变（PDR）；
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