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Right orbit, composite view of histological slides

Optic nerve (ON); the ophthalmic artery (OA) is surrounded by oculomotor foramen structures (abducens nerve, nasociliaris nerve, two branches of oculomotor nerve); the skeletal muscle fibers of the extraocular muscles (M) are separated by thin layers of fibrous tissue (FT); the annular fibrous tissue (annulus of Zinn) is continuous with the skull base dura (D).

(Source: Lacey H, Oliphant H, Smith C, Koenig M, Rajak S. Topographical anatomy of the annulus of Zinn. Sci Rep 2022;12[1]:1064. Creative Commons Attribution 4.0 International [CC BY 4.0] license, creativecommons.org/licenses/by/4.0.)