Central Retinal Artery Occlusion Due to Orbital Segment Ophthalmic Artery Aneurysm

Central retinal artery occlusions occur in 1 in 100,000 people. Etiologies include vasculitis, local thrombosis, or embolism. It carries an increased risk of stroke and myocardial infarction. There is no proven treatment for central retinal artery occlusion and thus evaluation and treatment is targeted at identifying and treating underlying risk factors to reduce the risk of stroke and myocardial infarction. Embolisms may originate from venous thrombus if a right-left shunt exists; a cardiac thrombus; calcific or septic embolus from diseased cardiac valve; from great vessel, carotid artery, or ophthalmic artery disease including stenosis, arteriosclerotic plaque, dissection, or aneurysm.