Representative preoperative computed tomograpgy (CT) scan of a traumatic optic neuropathy (TON) patient (a) Coronal view; (b) Horizontal view. A modified surgical procedure for endoscopic optic nerve decompression for the treatment of traumatic optic neuropathy. Chen F, Zuo K, Feng S, Guo J, Fan Y, Shi J, Li H - North American journal of medical sciences (2014). Not Altered. CC.