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图象视网膜电图(pattern electroretinogram简称P-ERG)是通过如光栅条纹或棋盘方格等图象刺激所诱发的后极部视网膜综合电反应。它的临床应用仅10多年,已在黄斑部病变和视神经病变等的功能检查上显示了较大的优越性。为了记录黄斑部小范围的视网膜电反应,除需采用平均技术克服噪音,把几微伏的电反应放大引出外,还必须克服光线在眼内弥散所诱发的视网膜其他部位的电活动。为此,Riggs等(1964)首先采用交替光栅条纹图象(alternating gratings)作为刺激,由于黑白条纹的宽度和数目相等,在一定频率下快速转换时并不引起平均亮度的变化,从而弥散光也不发生变化,因
The pattern electroretinogram (P-ERG) refers to the posterior pole retina induced by image stimulation such as grating stripe or checkerboard. Its clinical application only 10 years, has been in macular degeneration and optic neuropathy and other functional tests showed greater superiority. In order to record a small area of the macular retinal electrical response, in addition to using average technology to overcome the noise, the few micro-volts of the electrical amplification amplification, but also to overcome the light scattered in the eye caused by other parts of the electrical activity of the retina. To this end, Riggs et al. (1964) first used alternating gratings as stimuli. Since the widths and numbers of black and white stripes are equal, the rapid change at a certain frequency does not cause a change in average luminance, Not change, because