tonometer
noun
to·nom·e·ter
tō-ˈnä-mə-tər 
1
: an instrument or device for determining the exact pitch or the vibration rate of tones
2
: an instrument for measuring tension or pressure and especially intraocular pressure
Examples of tonometer in a Sentence
Recent Examples on the Web
Today, ophthalmologists measure IOP during eye exams using tools called tonometers, which either send a puff of air into the eye or press a probe against the eye’s numbed surface.
—
IEEE Spectrum, 25 July 2017
Eye doctors today measure this intraocular pressure using a tonometer, but the test is not always accurate.
—IEEE Spectrum, 24 Aug. 2014
While Morgan was wearing the Chibis pants, Meir used a tonometer to measure his eye pressure, with doctors on Earth watching in real time.
—Ashley Strickland, CNN, 23 Mar. 2020
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IEEE Spectrum, 25 July 2017
Eye doctors today measure this intraocular pressure using a tonometer, but the test is not always accurate.
—IEEE Spectrum, 24 Aug. 2014
While Morgan was wearing the Chibis pants, Meir used a tonometer to measure his eye pressure, with doctors on Earth watching in real time.
—Ashley Strickland, CNN, 23 Mar. 2020
Cite this Entry
“Tonometer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tonometer. Accessed 14 Jul. 2025.
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tonometer
noun
to·nom·e·ter
tō-ˈnäm-ət-ər
: an instrument for measuring tension or pressure and especially intraocular pressure
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