(A) The patient with marked proptosis, eyelid edema, and purulent discharge. (B) Fundus photograph at initial examination reveals optic disc edema, attenuated arterioles and venules, preretinal and intraretinal hemorrhages, and retinal whitening. (C) Coronal contrast-enhanced T1-weighted magnetic resonance imaging demonstrates enhancement of orbital soft tissue and opacification of ethmoidal air cells. (D) Axial T1-weighted magnetic resonance imaging shows marked proptosis, soft tissue thickening, and edema.