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optic nerve

noun, Anatomy
either one of the second pair of cranial nerves, consisting of sensory fibers that conduct impulses from the retina to the brain.
Origin of optic nerve
1605-15 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for optic nerve
  • In patients with glaucoma, fluid builds up within the eye and puts pressure on the optic nerve.
  • The device stimulates the retina's remaining healthy cells, causing them to relay the data to the optic nerve.
  • The anatomy of the optic nerve suggests that covering one eye does not cause input to only one brain hemisphere.
  • The electrodes stimulate the neurons in the retina, which send secondary signals down the optic nerve to the brain.
  • At the point where the optic nerve is connected in a normal eye, there's a patch in the retina that doesn't respond to light.
  • The optic stalk is converted into the optic nerve by the obliteration of its cavity and the growth of nerve fibers into it.
  • The symptoms are due to the tumor growing and pressing on the optic nerve and nearby structures.
  • Optic gliomas occur in the optic nerve and other parts of the eye.
  • It was pressing dangerously on his optic nerve and bulging into his nasal sinus, where it had actually eaten through a bony wall.
  • The eye care provider will then use special lenses to view your retina, blood vessels, and optic nerve.
British Dictionary definitions for optic nerve

optic nerve

the second cranial nerve, which provides a sensory pathway from the retina to the brain
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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optic nerve in Medicine

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.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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optic nerve in Science
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 American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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optic nerve in Culture

optic nerve definition

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

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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