Combined occlusion of branch retinal artery and vein secondary to prepapillary arterial loops.

A middle-aged diabetic and hypertensive man presented with diminished vision in the left eye. Fundus examination revealed prepapillary arterial loops, but with features of venous rather than arterial occlusion. Fluorescein angiography and optical coherence tomography confirmed the presence of a branch retinal vein occlusion along with two branch retinal artery occlusions. The resultant macular edema responded well to intravitreal triamcinolone and laser photocoagulation though the visual improvement was moderate.