Definition of optic nerve
: either of the second pair of cranial nerves that pass from the retina to the optic chiasma and conduct visual stimuli to the brain — see eye illustration
First Known Use of optic nerve
Medical Definition of optic nerve
: either of the pair of sensory nerves that comprise the second pair of cranial nerves, arise from the ventral part of the diencephalon, form an optic chiasma before passing to the eye and spreading over the anterior surface of the retina, and conduct visual stimuli to the brain—called also second cranial nerve
Seen and Heard
What made you want to look up optic nerve? Please tell us where you read or heard it (including the quote, if possible).