a point about ten percent above the exact center of a printed page or layout.
optic center n.
The point in the lens of the eye where light rays cross as they move from the cornea to the retina.
- Optic cup
optic cup n. A two-walled cuplike depression, formed by invagination of the optic vesicle, that develops into the pigmented and sensory layers of the retina. Also called eyecup.
- Optic decussation
optic decussation n. See optic chiasm.
- Optic disc
noun 1. a small oval-shaped area on the retina marking the site of entrance into the eyeball of the optic nerve See blind spot (sense 1)
- Optic disk
optic disk n. The small, circular, optically insensitive region in the retina containing no rods or cones, where fibers of the optic nerve emerge from the eyeball. Also called blind spot, optic papilla.