optic canal


Also found in: Dictionary, Thesaurus, Medical, Legal, Wikipedia.

optic canal

[′äp·tik kə′nal]
(anatomy)
The channel at the apex of the orbit, the anterior termination of the optic groove, just beneath the lesser wing of the sphenoid bone; it gives passage to the optic nerve and ophthalmic artery.
Mentioned in ?
References in periodicals archive ?
2) Our case emphasizes the significance of anatomical variations, particularly bony dehiscence over the optic canal.
After the bone between the optic canal and the anterior clinoid process has been removed, the clinoid is anchored to bone only through the optic strut.
Positioned like that, the optic strut separates optic canal from the medial portion of superior orbital fissure.
The surgeon must always remember that the optic canal and internal carotid artery may not be well protected in the area of sphenoid and are liable to injury.
High incidence of optic canal involvement in tuberculum sellae meningiomas: Rationale for aggressive skull base approach.
A sign of meningioma originating in the optic canal.
Subtle erosion and expansion of optic canal is better appreciated with CT, while MRI is better in showing intracanalicular, chiasmatic or retrochiasmatic tumour extension.
A cranial computed tomography (CT) scan was performed and a mass around the left orbital apex invading the superior orbital fissure and the optic canal with intradural growth could be seen (Fig.
This study aimed to investigate the surgical indications of exploring the optic canal and visual prognostic factors in the neurosurgical treatment of TSMs.
Computed tomography (CT) detected soft-tissue density in the left orbital apex and a widening of the left bony optic canal (figure 1).
CT brain reveals intraconal mixed density lesion with solid cystic component causing proptosis and widening of optic canal extending to middle cranial fossa possibly optic nerve glioma.
2-7) Kainz and Stammberger wrote that these cells may or may not contain tuberculum nervi optici (the bulging of the optic canal into the wall of the Onodi cell).