SUMMARYAn indirect method of measuring systolic bloodpressure in the supra-orbital arteries by an ultrasonic technique is described. The results are repeatable and the expected differences are shown with changes of posture. Calculation of pressure indices has shown significant variation between normal, hypertensive, and arteriosclerotic subjects. The method should be of value in assessing the significance of occlusive lesions of the carotid vessels.A SIMPLE method of indirect measurement of bloodpressure in the supra-orbital artery should be of value in elucidating the haemodynamics of the cerebral circulation. There are many techniques available at present, such as ophthalmodynamometry (Eastcott,
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