Tonometer

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tonometer

[tō′näm·əd·ər]
(medicine)
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.

Tonometer

 

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

References in periodicals archive ?
The KAT uses the 'Goldmann method' of measuring intraocular pressure of the eye, calculating the force required to flatten a constant area of the cornea using a special prism mounted on the tonometer head and placed against the cornea.
The handheld, air-puff, noncontact tonometer has been used for the measurement of intraocular pressure (IOP) since 1972.
With the help of a new device you can also believe contactless tonometers. We dont have analogs of such a device in the country, said Roman Kiriakov, the head of the department of heat engineering measuring instruments of the Krasnoyarsk Central Metallurgical Station.
04 Which statement is incorrect with regards to the tonometer shown in the image?
Considering all of the above factors, the analysis of the impact of blood pulsation phases on the results obtained from the Corvis tonometer is practically interesting.
Comparison of intraocular pressure measurements between the Tono-Pen XL[R] and Perkins[R] applanation tonometers in dogs and cats.
BiCOM Inc., is a home of groundbreaking transpalpebral glaucoma diagnostics technology through the eyelid and sclera Diaton tonometer used by ophthalmologists, optometrists and other healthcare professionals in over 60 countries.
(5) This tonometer is restricted to use in eyes with a corneal diameter exceeding 9.0 mm (6) and requires the application of a local anesthetic.
In the absence of controlled studies specifically on disinfection or sterilization of the pneumatonometer and other tonometers, the tips of such tonometers should be routinely cleaned, then disinfected or sterilized after each patient use.
(16,17) As none of the tonometers used in the present study allowed the evaluation of CCT or other parameters which may affect IOP measurement such as ocular rigidity or hysteresis, we used IOP values adjusted for CCT in our analysis.
Tonometers need to be checked regularly to ensure that they are correctly calibrated.
To compare a new digital Goldmann applanation tonometer (dGAT) that measures intraocular pressure (IOP) in 0.1 mmHg increments to a standard Goldmann applanation tonometer (sGAT).