Cilioretinal artery occlusion with central retinal vein occlusion

Background: Combined cilioretinal artery and retinal vein occlusions are in frequently documented retinal vascular disorders of speculative origin. Occ lusion of the cilioretinal artery is believed to result from either mechani cal compression of the artery as a result of an increase in venous pressure or from a reduction in perfusion pressure in both the cilioretinal and ret inal arteries. The ophthalmoscopic and angiographic features of this condit ion are reviewed. Case Reports: Two cases of cilioretinal artery occlusion after central retinal vein occlusion are presented, one of which evolved to the development of iris neovascularization. Discussion: The incidence of c ilioretinal artery occlusions due to central retinal vein occlusions is inf requently reported in the literature. Excluding those with chronic cystoid macular edema, most patients have a favorable visual outcome. It is possibl e that the incidence of combined cilioretinal artery and central retinal ve in occlusions is grossly underestimated.