The ocular ischemic syndrome. Clinical, fluorescein angiographic and carotid angiographic features.

The records of 43 consecutive patients (51 eyes) with the ocular ischemic syndrome (ocular symptoms and signs attributable to severe carotid artery obstruction) were studied in a retrospective fashion. Men comprised 67% of the group and the mean age at presentation was 64.5 years. In the anterior segment, neovascularization of the iris was observed in 66% of eyes and iritis was noted in 18%. Posterior segment signs included narrowed retinal arteries and dilated, but not tortuous, retinal veins. Mid-peripheral retinal hemorrhages were seen in 80% of eyes, posterior segment neovascularization was observed in 37%, and a cherry red spot was noted in 12%. Fluorescein angiography commonly revealed delayed choroidal and retinal filling, while electroretinography generally demonstrated a reduction in the amplitude of both the a- and b-waves.