Figure 10: Other atypical causes of optic neuropathy. A. Citomegalovirus retinitis in a patient with AIDS. B. Neuroretinitis: Notice the optic nerve swelling and the macular edema with hard exudates around the fovea. C. Sarcoid granuloma of the optic nerve head. D. Infiltrative optic neuropathy due to lekemia. Courtesy of Spanish Society of Ophthalmology.