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Encyclopedia > Optic canal

optical canal information


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eMedicine - Optic Neuropathy, Compressive : Article by Talmadge (Ted) Cooper (2738 words)
The triad of optic disc swelling followed by optic atrophy, optociliary shunt veins (optochoroidal collaterals), and progressive visual loss commonly is reported in compressive lesions of the orbital and intracanalicular optic nerve.
Optic canal decompression for tumors in the intracanalicular area is extremely risky and not uncommonly results in the loss of any remaining vision, unless the tumor has a large exophytic component.
Optic neuritis usually presents with acute or subacute visual loss in a patient younger than 50 years and is frequently associated with pain on eye movement.
Optic nerve - Wikipedia, the free encyclopedia (852 words)
The optic nerve is the second of twelve paired cranial nerves but is considered to be part of the central nervous system as it is derived from an outpouching of the diencephalon during embryonic development.
The optic nerve component lengths are 1 mm in the globe, 25 mm in the orbit, 9 mm in the optic canal and 16 mm in the cranial space before joining the optic chiasm.
Optic neuritis is inflammation of the optic nerve.
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