[Orthostatic cephalic hypotension and the eye (author's transl)].

The pressure in the ophthalmic artery was measured during change of posture from the lying position to the sitting position by means of Muller's ophthalmodynamometer. In 210 healthy individuals there was a fall of average pressure between 0 and 21 percent. In 89 patients having a certainly pathological fluctuation of 25 percent or more which could not be found in the brachial pressure. Such patients did not only have general orthostatic symptoms but also various ocular symptoms.