optic disc

noun

variants or optic disk
plural optic discs or optic disks
: the small circular area at the back of the retina where the optic nerve enters the eyeball and which is devoid of rods and cones and is not sensitive to light : blind spot sense 1a

Examples of optic disc in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
One hypothesis is that rapid improvements in blood sugar could contribute to swelling in the optic disc, Hersh Varma, MD, a neuro-ophthalmologist and associate professor with The Ohio State University Wexner Medical Center, told HEALTH. — Sherri Gordon, HEALTH, 11 Nov. 2026

Word History

First Known Use

1858, in the meaning defined above

Time Traveler
The first known use of optic disc was in 1858

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Cite this Entry

“Optic disc.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/optic%20disc. Accessed 15 Nov. 2026.

Medical Definition

optic disc

noun
variants or optic disk
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