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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. 7.

Fig. 7

Inferior surface of the intraorbital part of the optic nerve (ON), showing the central retinal artery (CRA) and vein (CRV) and their site of penetration into the sheath of the optic nerve in a rhesus monkey. (Reproduced from Hayreh SS 1965b.)

Abbreviations: CRA = Central retinal artery; CRV = Central retinal vein; OA = Ophthalmic artery; ON = Optic nerve.