Tonometry

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Related to applanation tonometer: tonometry, Schiotz tonometer

Tonometry

 

the measurement of pressure—usually referring specifically to intraocular pressure. All tonometric methods are based on measurement of the eyeball’s capacity for deformation.

The approximate magnitude of intraocular pressure can be estimated by digital tonometry—the examiner making a subjective judgment of the degree of firmness of the eye by pressing it with the fingers. Greater accuracy in tonometry is achieved by the use of tonometers of varying design. Impression tonometry measures the degree of indentation of the eyeball produced by the tonometer rod and translates the reading into measures of intraocular pressure. Applanation tonometry measures the extent to which the eye can be flattened; the imprint (or tonogram) produced by a cylinder’s pressure on the eye is in the shape of a small circle, whose dimensions are converted into an index of pressure.

References in periodicals archive ?
A MEDICAL DEVICE alert has been issued on the Goldmann applanation tonometer prism after inappropriate disinfectants were found to be repeatedly used on the equipment which could result in corneal irritation.
with applanation tonometer ampolletas parts, manual and carrying case, according to technical specifications annex no.
Goldmann and Schmidt originally reported that the average IOP in 400 eyes measured using the Goldmann applanation tonometer was 15.
WCCT Global has the tools to run these trials including: atomic clocks and watches for time synchronization, six (6) refrigerated centrifuges, 12+ ECG Machines, three -70ae C freezers, several -20ae C freezers, several 2-8aeC refrigerators, treadmill equipment, slit lamps, Goldmann and Perkins applanation tonometers, pupillometers, telemetry and holter-capable, stadiometers, crash carts, nitric oxide machine, a platelet aggregometry lab and multiple spirometry units.
We have also distributed some slit lamps and few s/h Keeler Pulsairs--supplemented by two new Keeler Intellipuff NCTs, 15 gonioscopes and four Goldmann applanation tonometers which I purchased myself.
Those at the meeting also agreed that the current situation is resulting in a number of low risk patients being referred to hospital, a problem which could be reduced if community optometrists would be able to increase the accuracy of referrals on intraocular pressures if they were funded to repeat IOPs using slit-lamp mounted Goldmann applanation tonometers.