Definitions for optic disk
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Princeton's WordNet
blind spot, optic disc, optic disk(noun)
the point where the optic nerve enters the retina; not sensitive to light
U.S. National Library of Medicine
Optic Disk
The portion of the optic nerve seen in the fundus with the ophthalmoscope. It is formed by the meeting of all the retinal ganglion cell axons as they enter the optic nerve.
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