不同哺乳动物的视觉系统之间虽然存在有解剖学上的差异，但是其总体框架是十分相似的。以灵长类动物为例，自视网膜节细胞发出的轴突形成视神经，经视交叉后分成两束，分别终止于同侧和对侧的外侧膝状核。外侧膝状核内细胞群的轴突通过视放射，又投射到同侧大脑视皮层的特定部 Although there are anatomical differences between the different mammalian visual systems, the overall framework is very similar. Taking primate as an example, axons from the retinal ganglion cells form optic nerves and are divided into two bundles after optic chiasm, terminating in the lateral geniculate nucleus, ipsilateral and contralateral, respectively. The axons of the cell population in the lateral geniculate nucleus project to the specific part of the visual cortex of the ipsilateral brain