disk of optic nerve

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• optic nerve — Anat. either one of the second pair of cranial nerves, consisting of sensory fibers that conduct impulses from the retina to the brain. See illus. under eye. [1605 15] * * * ▪ anatomy   second cranial nerve, which carries sensory nerve impulses… …   Universalium

• Coloboma of optic nerve — Morning Glory syndrome Classification and external resources OMIM 120430 Coloboma of optic nerve or Morning Glory syndrome is a rare defect of the optic nerve that causes moderate to severe blindness. It is extremely rare, occurring in only one… …   Wikipedia

• coloboma at optic nerve entrance — a coloboma of the optic disk that affects only the optic nerve …   Medical dictionary

• Optic disc drusen — Classification and external resources ICD 10 H47.3 ICD 9 377.21 …   Wikipedia

• Optic disc — Interior of posterior half of bulb of left eye. The veins are darker in appearance than the arteries …   Wikipedia

• optic atrophy — n degeneration of the optic nerve * * * degeneration of the optic nerve. It may be secondary to disease within the eye or it may follow damage to the nerve itself resulting from injury or inflammation. It is visible as pallor of the optic nerve… …   Medical dictionary

• optic papilla — n 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 * * * see optic disc * * * discus nervi optici …   Medical dictionary

• disk — 1. A round, flat plate; any approximately flat circular structure. 2. SYN: lamella (2). 3. In dentistry, a circular piece of thin paper or other material, coated with an abrasive substance, used for cutting and polishing tee …   Medical dictionary

• Optic disc pit — An optic disc pit is a congenital excavation (or regional depression) of the optic nerve head resulting from a malformation during development of the eye. Optic pits are important because they are associated with posterior vitreous detachments… …   Wikipedia

• optic neuritis — ▪ pathology        inflammation of the optic nerve (the second cranial nerve). The inflammation causes a fairly rapid loss of vision in the affected eye (eye, human), a new blind spot (a scotoma, usually in or near the centre of the visual field) …   Universalium

• Optic cup — The white, cup like area in the center of the optic disc. The optic disk is the circular area at the back of the inside of the eye where the optic nerve connects to the retina. * * * optic cup n the optic vesicle after invaginating to form a 2… …   Medical dictionary