Nonarteritic anterior ischemic optic neuropathy (NAION). a. Fundus photo of the right eye of a patient with NAION demonstrating a swollen optic nerve with retinal nerve fiber layer hemorrhages in the peripapillary area and indistinct changes at the fovea. b. Macular line scan through the swollen optic nerve head and fovea of the patient demonstrates the presence of intraretinal (arrow head) and subfoveal fluid (arrow).