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en-wikipedia-org-6572		Optic nerve - Wikipedia			.html	text/html	2626	379	60	In humans, the optic nerve is derived from optic stalks during the seventh week of development and is composed of retinal ganglion cell axons and glial cells; it extends from the optic disc to the optic chiasma and continues as the optic tract to the lateral geniculate nucleus, pretectal nuclei, and superior colliculus.[1][2] The fibers from the retina run along the optic nerve to nine primary visual nuclei in the brain, from which a major relay inputs into the primary visual cortex. The proportion of decussating fibers varies between species, and is correlated with the degree of binocular vision enjoyed by a species.[5] Most of the axons of the optic nerve terminate in the lateral geniculate nucleus from where information is relayed to the visual cortex, while other axons terminate in the pretectal nucleus[6] and are involved in reflexive eye movements. Optic nerve.Deep dissection.Inferior view. Optic nerve.Deep dissection.Inferior view.	./cache/en-wikipedia-org-6572.html	./txt/en-wikipedia-org-6572.txt