Tonometer

tonometer /to·nom·e·ter/ (to-nom´e-ter) an instrument for measuring tension or pressure, particularly intraocular pressure.

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air-puff tonometer  an instrument for measuring intraocular pressure by sensing deflections of the cornea in reaction to a puff of pressurized air.

applanation tonometer  an instrument that measures intraocular pressure by determination of the force necessary to flatten a corneal surface of constant size.

impression tonometer , indentation tonometer an instrument that measures intraocular pressure by direct pressure on the eyeball.

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to·nom·e·ter (t-nm-tr)

n.

Any of various instruments for measuring pressure or tension, especially one used in tonography.

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tono·metric (tn-mtrk) adj.

to·nome·try n.

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Tonometer

An instrument that measures intraocular pressure (IOP).

Mentioned in: Eye Examination

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tonometer

an instrument for measuring tension or pressure, especially intraocular pressure.

Principles of the tonometer. By permission from Guyton R, Hall JE, Textbook of Medical Physiology, Saunders, 2000

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applanation tonometer

measures the force required to flatten or applanate an area of cornea. Includes the MacKay-Marg, Halberg, Dräger and Goldmann tonometers.

indentation tonometer

measures the pressure required to indent the cornea; includes the Schiotz and pneumatonograph.