A 15-year-old healthy boy, diagnosed as having JG at age 10 years, visited his local ophthalmologist for painless vision loss in the left eye for 3 days. He denied illicit drug use. His IOPs were 34 mm Hg OD and 30 mm Hg OS while he was receiving timolol maleate, brimonidine tartrate, and latanoprost. On referral, best-corrected visual acuities were 20/20 OD and 20/40 OS. With addition of acetazolamide, IOPs were 36 mm Hg OD and 27 mm Hg OS. The pupils, anterior segments, and anterior chamber angles were normal. Fundus examination of the left eye showed dilated and tortuous veins, optic disc and intraretinal hemorrhages, and retinal whitening along the distribution of the cilioretinal artery (Figure 1A and B). The fundus of the right eye was unremarkable. Visual fields were reliable and full, but Amsler grid testing showed an inferocentral scotoma in the left eye. Angiography demonstrated delayed venous and cilioretinal arteriolar filling (Figure 1C) and disc leakage.