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目的对比并分析糖尿病视网膜病变(diabetic retinopathy,DR)重度非增生期及增生期的多焦视网膜电图(multifocal electroretinogram,mERG)一阶函数核的变化特征。方法选取DR患者46例72眼分为2组:一组为重度非增生性糖尿病视网膜病变(non-proliferative diabetic retinopathy,NPDR)患者23例38眼,另一组为增生性糖尿病视网膜病变(proliferative diabetic retinopathy,PDR)患者23例3