目的：观察增生型糖尿病视网膜病变(proliferative diabetic retinopathy,PDR)的多焦视网膜电图(multifocal electroretinogram，mf-ERG)的图像特征及临床意义。 方法：对临床确诊的PDR患者40例44眼（PDR组）和正常对照组40例40眼进行mf-ERG检查,并对所得数据进行统计分析。 结果：PDR患者组mf-ERG 1~5环的反应密度均低于正常对照组,且有显著性差异,N1波潜伏期在4环、P1波潜伏期在2~5环与正常对照组相比显著延长。 结论：Mf-ERG可有效地评价PDR患者视网膜的功能。

AIM:To observe the characteristics of the images of multifocal electroretinogram (mf-ERG)performed on the patients with severe proliferative diabetic retinopathy（PDR)and its clinical significance. METHODS:Forty PDR patients(44 eyes) and forty normal control subjects (40 eyes) were tested with mf-ERG. The data were processed with software SPSS 13.0. RESULTS:mf-ERG showed the response densities of ring 1-ring 5 areas in PDR were significantly decreased while the latencies of ring 4 of N1 wave and the latencies of ring 2,ring 3,ring 4 and ring 5 of P1 wave were significantly prolonged with normal control group. CONCLUSION:mf-ERG can provide more information to evaluate the retina function effectively in PDR.