Ophthalmodynamometry


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Ophthalmodynamometry

 

a method of measuring blood pressure in the blood vessels of the retina. The method involves ophthalmoscopic examination of the pulse of the central retinal artery or vein during a gradual increase in intraocular pressure, which is artificially induced by compressing the eyeball with an ophthalmodynamometer; this instrument was invented in 1917 by the French ophthalmologist P. Baillard. An ophthalmodynamometer consists of a rod with a blunt thickening at the end for compressing the eye and a graduated scale in the form of a disk with two indicators; the rod is connected to a coil spring that transmits the extent of the eye compression to the scale. The diastolic and systolic pressures in the central retinal artery of man are determined by compressing the eye with a force of 30–35 g and 70–75 g, respectively. Ophthalmodynamometry is a useful diagnostic tool in ophthalmology, neuropathology, and internal medicine.

References in periodicals archive ?
This article considers the clinical value of ophthalmodynamometry and its emerging role in the diagnosis and monitoring of glaucoma.
Other approaches include tympanic membrane displacement, ophthalmodynamometry, quantitative pupillometry, othoacoustic emission, pulsatility of the ocular circulation, retinal vein pressure correlation with ICP, prediction of ICP based on transcranial Doppler (TCD) and ABP simultaneous measurements [5-12].
The VOP is measured by ophthalmodynamometry and is an indirect method of measuring ICE The VOP is calculated as the pressure at which the retinal vein collapses with mild suction pressure.