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. Author manuscript; available in PMC: 2017 Jan 1.
Published in final edited form as: Prog Retin Eye Res. 2016 Jan;50:108–144. doi: 10.1016/j.preteyeres.2015.10.001

Fig. 4.

Fig. 4

Longitudinal section of the optic nerve in the rhesus monkey in the region of the optic canal, shows a capillary subarachnoid space (SAS) and fibrous band connecting the optic nerve with the surrounding sheath. (Reproduced from Hayreh SS. 1965a).