Optic
101optic axis — noun 1. in a doubly refracting crystal, the line in the direction of which no double refraction occurs a crystal may have either one or two optic axes • Hypernyms: ↑axis 2. a line that passes through the center of curvature of a lens so that… …
102optic chiasma — noun the crossing of the optic nerves from the two eyes at the base of the brain • Syn: ↑optic chiasm, ↑chiasma opticum • Hypernyms: ↑chiasma, ↑chiasm, ↑decussation …
103optic disk — noun the point where the optic nerve enters the retina; not sensitive to light • Syn: ↑blind spot, ↑optic disc • Hypernyms: ↑point • Part Holonyms: ↑retina …
104optic foramen — noun : the passage in the sphenoid bone traversed by the optic nerve and ophthalmic artery see optic groove …
105optic groove — noun : a narrow transverse groove that lies near the front of the superior surface of the body of the sphenoid bone, is continuous with the optic foramen, and houses the optic chiasma …
106optic papilla — noun : a slight elevation that is nearly coextensive with the optic disk and is produced by the thick bundles of the fibers of the optic nerve in entering the eyeball …
107optic thalamus — Thalamus Thal a*mus, n.; pl. {Thalami}. [L. thalamus chamber, Gr. qa lamos.] 1. (Anat.) A mass of nervous matter on either side of the third ventricle of the brain; called also {optic thalamus}. [1913 Webster] 2. (Bot.) (a) Same as {Thallus}. (b) …
108optic cup — noun Date: circa 1885 the optic vesicle after invaginating to form a 2 layered cup from which the retina and pigmented layer of the eye will develop called also eyecup …
109optic nerve — noun Date: 1615 either of the second pair of cranial nerves that pass from the retina to the optic chiasma and conduct visual stimuli to the brain see eye illustration …
110optic chiasm — noun see optic chiasma …
