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
Cite this Entry
“Optic disc.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/optic%20disc. Accessed 10 Sep. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share