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optic disc
(redirected from Optic nerve head)

    Also found in: Dictionary/thesaurus, Acronyms, Wikipedia 0.02 sec.
optic disc,
the small blind spot on the surface of the retina, located about 3 mm to the nasal side of the macula. It is the point where the fibers of the retina leave the eye and become part of the optic nerve. It is the only part of the retina that is insensitive to light. At its center the porus opticus marks the point of entrance of the central artery of the retina. Also called
Usage notes: (informal)
blind spot, discus nervi optici.


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Kelly said: "Normally the optic nerve head appearance is flat, but at the back of Eloise's eyes it was very raised and swollen, looking as though it was being pushed outwards.
My deadly cyst was spotted by optician; Eloise needed life-saving op ... by Daily Post (Liverpool, England)
In anterior ION, the insult is thought to be caused by occlusion of the short posterior ciliary arteries, with resultant ischemia of the optic nerve head.
Ischemic optic neuropathy by Given, Curtis A., II; Watson, J. Keith / Applied Radiology
The physician examines the optic nerve head for stability while covering and then uncovering one eye.
Simple exams work in vestibular testing: up to 50% of migraineurs ... by Norton, Patrice G.W. / Clinical Psychiatry News
 
 
 
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