Fig. 1

A 42-year-old HIV-positive male with recent onset floaters. Segmental sheathing and beading of arterioles and venules extend most prominently along the superotemporal arcades in the right eye (a). In the left eye, sheathing of the arteries and veins is most prominent along the inferotemporal arcade with peripapillary and intraretinal hemorrhage (b). Fluorescein angiography demonstrates normal arterial filling. The venous filling is segmental and shows areas of perivenous hypofluorescence in the right eye (c) and left eye (d)