The optic nerve exits the orbit through the canal that passes through which structure?

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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

The optic nerve exits the orbit through the canal that passes through which structure?

Explanation:
The optic nerve exits the orbit through the optic canal, a slender bony passage in the sphenoid bone at the orbital apex. This canal specifically carries the optic nerve (with accompanying vessels) from the eye into the cranial cavity toward the optic chiasm. Other openings—such as the superior orbital fissure, inferior orbital fissure, or sphenopalatine foramen—transmit different nerves and vessels and are not the route for the optic nerve.

The optic nerve exits the orbit through the optic canal, a slender bony passage in the sphenoid bone at the orbital apex. This canal specifically carries the optic nerve (with accompanying vessels) from the eye into the cranial cavity toward the optic chiasm. Other openings—such as the superior orbital fissure, inferior orbital fissure, or sphenopalatine foramen—transmit different nerves and vessels and are not the route for the optic nerve.

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