Spatial and temporal frequency tuning characteristics of the pattern electroretinogram (PERG) were analysed by means of the fast Fourier transform (FFT)technique.
用快速傅里叶转换（FFT）技术分析了图形视网膜电图（PERG）的空间和时间调谐特性。
Objective: To observe the change of pattern electroretinogram (PE RG ) and flash electroretinogram (FERG) in early period diabetic rats and guide the clinical prevention of diabetic retinopathy(DR).
目的：观察糖尿病大鼠早期视网膜功能的改变，指导临床对糖尿病视网膜病变（DR）的防治。
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