Through which canal does the optic nerve exit the orbit?

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Prepare for the NBEO Ocular Anatomy Posterior Segment and Cranial Nerves Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

Through which canal does the optic nerve exit the orbit?

Explanation:
The optic nerve exits the orbit through the optic canal. This small bony passage in the sphenoid bone links the orbit to the middle cranial fossa and is the designated route for the optic nerve (often with the ophthalmic artery) as it leaves the eye to reach the brain. The other openings serve different structures: the superior orbital fissure transmits nerves III, IV, VI and branches of V1 plus veins; the inferior orbital fissure carries infraorbital vessels and V2 branches; the foramen rotundum transmits V2.

The optic nerve exits the orbit through the optic canal. This small bony passage in the sphenoid bone links the orbit to the middle cranial fossa and is the designated route for the optic nerve (often with the ophthalmic artery) as it leaves the eye to reach the brain. The other openings serve different structures: the superior orbital fissure transmits nerves III, IV, VI and branches of V1 plus veins; the inferior orbital fissure carries infraorbital vessels and V2 branches; the foramen rotundum transmits V2.

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