Definitions for "Optic disc"
or optic nerve head: Eyeball end of the optic nerve. Denotes the site of exit of retinal nerve fibers from the eye and entrance of blood vessels into the eye.
The area from where all of the neural fibers leave the eyeball.
the junction of all of the retinal nerve fibers at the beginning of the optic nerve. Appears as a grayish disc shape near the fovea in fundus photos.