Perioperative visual loss after spine surgery

Figure 1 Schematic representation of blood supply of the optic nerve. Reproduced from Hayreh et al[20]. A: Arachnoid; C: Choroid; CRA: Central retinal artery; Col. Br.: Collateral branches; CRV: Central retinal vein; D: Dura; LC: Lamina cribrosa; ON: Optic nerve; P: Pia; PCA: Posterior ciliary artery; PR: Prelaminar region; R: Retina, S: Sclera; SAS: Subarachnoid space.

Figure 2 Fundoscopic exam of acute anterior ischemic optic neuropathy demonstrating blurring of the optic disk margin from edema. Lee LA, Mudumbai R. Postoperative visual loss. In: Ehab Farag, editor. Anesthesia for Spine Surgery. Cambridge University Press, 2012.