Vagina interna nervi optici

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vagina interna nervi optici --> internal sheath of optic nerve

(Science: anatomy, nerve) The innermost sheath around the optic nerve, continuous with the leptomeninges (pia-arachnoid) and including a cerebrospinal fluid-filled intervaginal space, continuous with the subarachnoid space.

Synonym: vagina interna nervi optici.