optic nerve

noun

: 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

Examples of optic nerve in a Sentence

Recent Examples on the Web There is no cure, but if caught early enough, it can be controlled either by eye drops that reduce the pressure of fluid on the optic nerve or, in some cases, by laser surgery. Avery Hurt, Discover Magazine, 29 Apr. 2024 This elevated pressure poses a risk of damaging the optic nerve, which relays visual information to the brain, leading to irreversible vision loss. IEEE Spectrum, 22 Mar. 2024 Those signals are sent by the optic nerve to the brain to create the image a person sees. Mary Kekatos, ABC News, 31 Mar. 2024 The retina plays a critical role in the process of vision, converting light into neural signals that are then sent to the brain through the optic nerve. George Dvorsky / Gizmodo, Quartz, 13 Mar. 2024 The images captured by the device are combined to create a detailed 3D model of your inner eye, highlighting the intricate structures such as the fovea, optic nerve, and Henle fibers. William A. Haseltine, Forbes, 11 Feb. 2024 The Lake Elsinore, California, native was born with optic nerve hypoplasia and diagnosed with autism at age 4. Joelle Goldstein, Peoplemag, 9 Feb. 2024 The good news was that doctors knew almost instantly what was wrong with me (optic neuritis, or inflammation of the optic nerve) and how to treat it (five days of intravenous steroids). Erika Fry, Fortune, 27 Jan. 2024 Glaucoma Glaucoma damages the optic nerve, which connects the eye's retina to the brain, when too much pressure is put on the eye. Kristin Canning, Health, 30 June 2023

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'optic nerve.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1615, in the meaning defined above

Time Traveler
The first known use of optic nerve was in 1615

Dictionary Entries Near optic nerve

Cite this Entry

“Optic nerve.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/optic%20nerve. Accessed 26 May. 2024.

Kids Definition

optic nerve

noun
: either of a pair of sensory nerves that are the second pair of cranial nerves and carry visual information from the retina of the eye to the brain

Medical Definition

optic nerve

noun
: 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

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