noun, Anatomy.
either one of the second pair of cranial nerves, consisting of sensory fibers that conduct impulses from the retina to the brain.
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.
optic nerve
Either of the second pair of cranial nerves, which carry sensory information relating to vision from the retina of the eye to the brain. Disease or injury of the optic nerve can result in partial or total blindness.

The nerve that carries electrical signals from the retina in the eye to the brain.


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  • Optic neuritis

    optic neuritis n. Inflammation of the optic nerve. Also called neuropapillitis, retrobulbar neuritis.

  • Optico-

    optico- pref. Optic; optic nerve: opticopupillary.

  • Opticociliary

    opticociliary op·ti·co·cil·i·ar·y (ŏp’tĭ-kō-sĭl’ē-ěr’ē) adj. Relating to the optic and the ciliary nerves.

  • Opticokinetic nystagmus

    opticokinetic nystagmus op·ti·co·ki·net·ic nystagmus (ŏp’tĭ-kō-kə-nět’ĭk, -kī-) n. A nystagmus induced by looking at moving visual stimuli.

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