Optic canal

optic foramenCanalis opticuseye sockets
The optic foramen is the opening to the optic canal.wikipedia
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Ophthalmic artery

ophthalmicartery to the eyeLateral muscular branch
The superior surface of the sphenoid bone is bounded behind by a ridge, which forms the anterior border of a narrow, transverse groove, the chiasmatic groove (optic groove), above and behind which lies the optic chiasma; the groove ends on either side in the optic foramen, which transmits the optic nerve and ophthalmic artery (with accompanying sympathetic nerve fibres) into the orbital cavity.
The OA arises from the internal carotid along the medial side of the anterior clinoid process and runs anteriorly passing through the optic canal with and inferolaterally to the optic nerve.

Chiasmatic groove

The superior surface of the sphenoid bone is bounded behind by a ridge, which forms the anterior border of a narrow, transverse groove, the chiasmatic groove (optic groove), above and behind which lies the optic chiasma; the groove ends on either side in the optic foramen, which transmits the optic nerve and ophthalmic artery (with accompanying sympathetic nerve fibres) into the orbital cavity.
The groove ends on either side in the optic foramen, which transmits the optic nerve and ophthalmic artery into the orbital cavity.

Sphenoid bone

sphenoidbasisphenoidpresphenoid
The superior surface of the sphenoid bone is bounded behind by a ridge, which forms the anterior border of a narrow, transverse groove, the chiasmatic groove (optic groove), above and behind which lies the optic chiasma; the groove ends on either side in the optic foramen, which transmits the optic nerve and ophthalmic artery (with accompanying sympathetic nerve fibres) into the orbital cavity. The optic foramen is the opening to the optic canal. The canal is located in the sphenoid bone; it is bounded medially by the body of the sphenoid and laterally by the lesser wing of the sphenoid.
By about the ninth week of fetal development an ossific center appears for each of the small wings (orbito-sphenoids) just lateral to the optic foramen; this is followed by the appearance of two nuclei in the presphenoid part of the body.

Optic nerve

optic nervesoptical nerveoptic
The superior surface of the sphenoid bone is bounded behind by a ridge, which forms the anterior border of a narrow, transverse groove, the chiasmatic groove (optic groove), above and behind which lies the optic chiasma; the groove ends on either side in the optic foramen, which transmits the optic nerve and ophthalmic artery (with accompanying sympathetic nerve fibres) into the orbital cavity.
The optic nerve leaves the orbit (eye socket) via the optic canal, running postero-medially towards the optic chiasm, where there is a partial decussation (crossing) of fibers from the temporal visual fields (the nasal hemi-retina) of both eyes.

Orbit (anatomy)

orbitorbitseye socket
The superior surface of the sphenoid bone is bounded behind by a ridge, which forms the anterior border of a narrow, transverse groove, the chiasmatic groove (optic groove), above and behind which lies the optic chiasma; the groove ends on either side in the optic foramen, which transmits the optic nerve and ophthalmic artery (with accompanying sympathetic nerve fibres) into the orbital cavity.
There is a supraorbital foramen, an infraorbital foramen, a superior orbital fissure, an inferior orbital fissure and the optic canal, each of which contains structures that are crucial to normal eye functioning.

Inferior orbital fissure

Fissura orbitalis inferiorinferior orbitalsphenomaxillary fissure

Optic chiasm

optic chiasmachiasmchiasma
The superior surface of the sphenoid bone is bounded behind by a ridge, which forms the anterior border of a narrow, transverse groove, the chiasmatic groove (optic groove), above and behind which lies the optic chiasma; the groove ends on either side in the optic foramen, which transmits the optic nerve and ophthalmic artery (with accompanying sympathetic nerve fibres) into the orbital cavity.

Sympathetic nervous system

sympatheticsympathetic nervesympathetic nerves
The superior surface of the sphenoid bone is bounded behind by a ridge, which forms the anterior border of a narrow, transverse groove, the chiasmatic groove (optic groove), above and behind which lies the optic chiasma; the groove ends on either side in the optic foramen, which transmits the optic nerve and ophthalmic artery (with accompanying sympathetic nerve fibres) into the orbital cavity.

Infraorbital foramen

Foramen infraorbitaleinfraorbital foraminaforamen on the maxilla

Lesser wing of sphenoid bone

orbitosphenoidlesserlesser wing of sphenoid
The main features of the lesser wing are the optic canal, the anterior clinoid process, and the superior orbital fissure.

Lacrimal artery

lacrimal
The lacrimal artery is an artery that arises close to the optic foramen, and is one of the largest branches derived from the ophthalmic artery.

Orbital fascia

Behind, it is united with the dura mater by processes which pass through the optic foramen and superior orbital fissure, and with the sheath of the optic nerve.

Levator palpebrae superioris muscle

levator palpebrae superiorislevator palpebraelevator
The levator palpebrae superioris originates on the lesser wing of the sphenoid bone, just above the optic foramen.

Middle cranial fossa

middle fossamiddlecranial fossa, middle
The middle part of the fossa presents, in front, the chiasmatic groove and tuberculum sellae; the chiasmatic groove ends on either side at the optic foramen, which transmits the optic nerve and ophthalmic artery to the orbital cavity.

Subfossil lemur

giant lemursgiant lemurtretretretre
This has been demonstrated by the ratio between their relatively small orbits (eye sockets) and the relative size of their optic canal, which is comparable to that of other lemurs, not diurnal anthropoids.

Base of skull

base of the skullskull basebasicranium
Optic foramen

Body of sphenoid bone

body of the sphenoidbody of the sphenoid bonebody
This surface is bounded behind by a ridge, which forms the anterior border of a narrow, transverse groove, the prechiasmatic groove, above and behind which lies the optic chiasma; the groove ends on either side in the optic foramen, which transmits the optic nerve and ophthalmic artery into the orbital cavity.

Cranial nerves

cranial nervecranialCN
The optic nerve (II) passes through the optic foramen in the sphenoid bone as it travels to the eye. It conveys visual information to the brain.