You searched for: “tonometer”
tonometer
1. An instrument for measuring tension or pressure.
2. An instrument by which intraocular pressure is measured; also called, ophthalmotonometer.
This entry is located in the following units: meter-, metro-, metr-, -metrical, -metrically, -metron, -metric, -metrist, -meter, -meters, -metry, -metre (page 41) tono-, -tonia, -tone, -tony, -tonic, -tonical (tension) + (page 3)
Word Entries containing the term: “tonometer”
electronic tonometer
1. An instrument that measures pressure in a body part; such as, the blood vessels, or the eyeball as a test for glaucoma.
2. An electronic device that measures hydrostatic pressure within the eye.

When it is put into position, a tiny movable plate is pressed against the eye, flattening a circular section of the cornea; 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 and a measurement can be made in about one second.

It is usually used in the diagnosis of glaucoma.

This entry is located in the following unit: electro-, electr-, electri- (page 69)