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 most commonly used tonometers in the veterinary field are the rebound tonometer, (TonoVet) and the applanation tonometer (TonoPen XL).
Our results indicated that there was no statistically significant difference in IOP measured in sitting and supine position with the Icare PRO tonometer. Therefore, we believe the Icare PRO tonometer may be appropriate for IOP monitoring in glaucoma patients who are confined to bed.
To prevent EKC transmission in eye care settings, recommended practices include the use of disposable tonometer tips, disinfectants efficacious against adenoviruses for tonometers and slit lamps, and single-use eye drops when available.
The Corvis tonometer allows for the acquisition of data in different formats such as a video (*.avi), a sequence of images (*.jpg), or a losslessly compressed archive (*.U12).
In addition to the US, the Icare HOME tonometer has been granted sales permits in all European countries and in Australia, Japan, South Korea, Taiwan, Brazil, Canada and China.
The pneumatonometer applanates a smaller area of the corneal surface than the Goldmann tonometer does.
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.
The IOP was measured first with APT (Canon Full Auto Tonometer TX-F, Japan) followed by its measurement with GAT (HAAG-STRIET AT 900, Koeniz Switzerland)
Keywords: Central corneal thickness (CCT), Goldmann Applanation Tonometer (GAT), Intraocular pressure (IOP), Pseudoexfoliation glaucoma (PXG), Pseudoexfoliation syndrome (PXF)
The ICare rebound tonometer, which is based on the induction rebound or impact principle, monitors the motion parameters of the probe colliding with an eye.
The Swiss research team used a device called the dynamic contour tonometer to check the OPA of 67 patients who were assumed to have CAS.