Superior Orbital Fissure — MFDS Part 1 MCQ
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Correct answer: C — Optic nerve
The correct answer is C, the optic nerve. The optic nerve enters the orbit through the optic canal, accompanied by the ophthalmic artery, rather than through the superior orbital fissure. The oculomotor and abducens nerves pass through the central part of the superior orbital fissure within the common tendinous ring. The trochlear nerve passes through its lateral part outside the ring. The lacrimal nerve, a branch of the ophthalmic division of the trigeminal nerve, also passes through the lateral part of the fissure. Therefore, each distractor is a genuine content of the superior orbital fissure.
Reference: Zoia C, Bongetta D, Gaetani P. Orbital Anatomy: Anatomical Relationships of Surrounding Structures. Journal of Neurological Surgery Part B: Skull Base. 2020. https://pubmed.ncbi.nlm.nih.gov/33072475/