Fig. 5. Optic nerve head drusen with visible drusen and ischemic optic neuropathy. Fundus photograph shows optic nerve head with flame hemorrhage and disc edema diagnostic of anterior ischemic optic neuropathy (A). Contralateral eye with visible drusen (B). Transverse B-scan of the right eye shows two round, highly calcified drusen at the optic nerve head with overlying optic disc edema (C). Transverse B-scan of the left eye shows two round, highly calcified drusen at the optic nerve head without optic disc edema (D). Optical coherent tomography of the peripapillary optic disc (E). The green band represents 95% percentile thickness of normal peripapillary nerve fiber layer. The black line represents the thickened nerve fiber layer due to edema in the right eye (upper panel) and thinning of the nerve fiber layer due to atrophy in the left eye (lower panel).