One thousand normal carotid angiograms were reviewed for the purpose of ascertaining the incidence of filling of the ophthalmic artery and the choroid plexus of the eye. An additional 90 carotid angiograms demonstrating occlusive disease of major cerebral vessels were studied with reference to the same orbital vessels. Routine carotid angiography without the use of a mechanical changer will demonstrate filling of the choroid vessels of the eye in about one-third of cases and of the ophthalmic artery in better than 75% of cases. Injection of the internal carotid artery greatly increases the probability of demonstrating the choroidal vessels. Occlusive disease of the internal carotid, middle cerebral, or anterior cerebral arteries is not associated with an increased incidence of filling of the intraorbital vessels. The use of a mechanical changer for carotid angiography is probably a superior method for demonstrating the intraorbital vessels.