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Dura of the skull base extended into the orbital apex

Dural sheath (A) shown continuing into the orbit anteriorly and posteriorly to unite with the common tendinous origin (B). Lateral rectus (C), inferior rectus (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.)

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