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optometer

[ op-tom-i-ter ]
/ ɒpˈtɒm ɪ tər /
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noun
any of various instruments for measuring the refractive error of an eye.
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Origin of optometer

First recorded in 1730–40; opto- + -meter

Words nearby optometer

optional, optionee, option money, opto-, optoelectronics, optometer, optometrist, optometry, optophone, optotype, opt out
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use optometer in a sentence

  • Test with optometer, and in reporting use the number on the stem preceded by F for far-sightedness, and N for near-sightedness.

    Degeneracy|Eugene S. Talbot

  • In using the optometer, find the place where vision of the dots is the easiest and most distinct.

    Degeneracy|Eugene S. Talbot

  • Now, the Javal-Bull optometer permits of a quick determination of the value of the amplitude of accommodation in dioptries.

    Scientific American Supplement, No. 620, November 19,1887|Various

British Dictionary definitions for optometer

optometer
/ (ɒpˈtɒmɪtə) /
noun
any of various instruments for measuring the refractive power of the eye
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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