optic foramen n.
See optic canal.
Anteromedially, the parietal forms the roof and posterior margin of the optic foramen.
Damage to the sphenoidal fissure, which occurred prior to preservation, obscures its relationship to the optic foramen.
The optic foramen is the most anterior of the three prominent holes seen within and immediately behind the orbit.
It forms the anterior floor of the optic foramen; whereas the frontal forms the anterior roof of the same opening.
The basisphenoid, which is fused with the parasphenoid, also forms a small part of the posteroventral margin of the optic foramen.
Behind and a little above the optic foramen is another small aperture, the foramen for the third nerve.
Above and slightly in front of the optic foramen is a median opening, the olfactory foramen.
The periosteum is then separated completely, as near to the optic foramen as possible.
The orbit contains seven muscles, six of which rise close to the optic foramen.