|the second cranial nerve, which provides a sensory pathway from the retina to the brain|
optic nerve n.
A nerve that originates from the retina, passes out of the eye socket to the chiasm, where part of its fibers cross to the opposite side and pass to the geniculate bodies and anterior quadrigeminal body. Also called second cranial nerve.
second cranial nerve, which carries sensory nerve impulses from the more than one million ganglion cells of the retina toward the visual centres in the brain. The vast majority of optic nerve fibres convey information regarding central vision
Learn more about optic nerve with a free trial on Britannica.com.