(redirected from tonometers)
Also found in: Dictionary, Thesaurus, Medical.


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.



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

References in periodicals archive ?
All the participants were educated about the method of study and the procedure of measuring the IOP with a tonometer.
04 Which statement is incorrect with regards to the tonometer shown in the image?
1) concluded that "Because Tono-Pen (TP) measurements were lower than Goldmann applanation tonometer (GAT) measurements and non-contact tonometer measurements were higher than GAT measurements, patient follow-ups, treatment strategies, and surgery plans must be organized taking these differences into consideration".
In this study, rebound tonometer was used because it is portable, has a lower platinum, and its impact on the eye is fast and minimal.
Independent t-test was performed for comparision of the mean IOP recorded with the two tonometers.
The method of IOP measurement with these tonometers has been described before.
Intraocular pressure (IOP) was measured with the TonoVet rebound tonometer in 10 raptor species, and possible factors affecting IOP were investigated.
Mumbai, Jan 21 (ANI/Business Wire India): Ophthalmic instrument specialist Keeler has recently launched its first Applanation Tonometer to rival the Goldmann.
The handheld, air-puff, noncontact tonometer has been used for the measurement of intraocular pressure (IOP) since 1972.
Because of the differences in tonometer design and uncertainties regarding disinfection, manufacturers of tonometers and other medical instruments used on the eye should consider 1) designing instruments that can be cleaned and disinfected or sterilized easily, preferably without disassembly, between uses on patients, 2) carefully testing disinfection or sterilization procedures for their products under use-condictions and by using appropriate test microorganisms, and 3) clearly outlining the tested procedures in user manuals.
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.