眼球象一个弱电池,有一个静息电位(即电荷)通过它,眼球的前面是阳极,后面是阴极。这个“静息电位”由视网膜色素上皮所产生。因为光线导致色素上皮基底膜去极化,后者转化为静息电位的改变,根据周围视网膜照度的情况,电位从1到数毫伏不等。视网膜照射导致静息电位在60～75秒的初始快速下降(快振荡),以后在7～14分钟 The eyeball is like a weak cell, with a resting potential (ie, charge) through it, anterior in front of the eyeball and cathode. This “resting potential” is produced by the retinal pigment epithelium. Because the light leads to depolarization of the pigment epithelial basement membrane, the latter translates into a change in resting potential, potentials range from 1 to several millivolts depending on the surrounding retinal illumination. Retinal exposure leads to an initial rapid fall in resting potential (fast oscillation) of 60-75 seconds, followed by 7-14 minutes