(OPG) The Oculoplethysmography is used to detect a hemodynamically significant stenosis of the carotid circulation, by measuring the arrival times of pulses in the eye and ear. Indirectly the blood flow in the ophthalmic artery is measured, which branches off the carotid artery and supplies blood to the eye. A delay between pulse arrival in the eye and ear is an indication of a hemodynamically significant stenosis in the vessel whose corresponding pulse is delayed.
Other ultrasound or angiography procedures are necessary to confirm the diagnosis and have also replaced this technique.

See also Plethysmography and Ultrasound Biomicroscopy.

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See also Ultrasound Biomicroscopy, A-Mode and A-Scan.