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An electronic instrument that measures hydrostatic pressure within the eye: when placed in position, a tiny movable plate is pressed against the eye, flattening a circular section of the cornea (no eyeball anesthesia is required); a current is then sent through a small electromagnet, of such value that it will just pull the plate away from the eye; the value of the current is proportional to eye pressure; a measurement can be made in about 1 second; used in diagnosis of glaucoma. Also known as electronic tonometer.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



an instrument for measuring pressure or tension—specifically, blood pressure in the arteries, intraocular pressure, and muscle tone or tension.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The actual IOP can be achieved by converting tonometric values using the regression formula.
Feely, "Assessment of arterial stiffness in hypertension: comparison of oscillometric (Arteriograph), piezoelectronic (Complior) and tonometric (SphygmoCor) techniques," Journal of Hypertension, vol.
Chinese scholars actually struggling over ideas concerning restored tuning devices, templates and sketches for bell and flute tonometrics, the appropriateness of different occasions and venues, and even hints at scoring-prosody, as I have shown here.
The same results can be obtained by analyzing the differences in tonometric values at Visit 3 of the study (significant non-inferiority with 95% interval beyond zero, p = 0.0046) but also the differences between the two groups of the subjective VAS data at rest and when moving.
Blood pressure was monitored continuously, either via the arterial catheter or noninvasively by a finger oscillometric (Finometer or Portapres; TNO) or radial tonometric (Colin) device.
Measurements on purified FPLC fractions were made using standard tonometric techniques at pH 7 at 20[degrees]C.
(8) An arterial tonometric method proved unreliable in extensive pilot studies by the first author at the FBI Academy, Quantico, Virginia.
Practitioners compare tonometric readings at various times to get another indication of the degree of edema and fibrosis.
Obtain 30 tonometric measurements each for |pO.sub.2~ and |pCO.sub.2~ over a one-week trial period.