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optometer

[op-tom-i-ter] /ɒpˈtɒm ɪ tər/
noun
1.
any of various instruments for measuring the refractive error of an eye.
Origin of optometer
1730-1740
First recorded in 1730-40; opto- + -meter
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for optometer
Historical Examples
  • In using the optometer, find the place where vision of the dots is the easiest and most distinct.

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

British Dictionary definitions for optometer

optometer

/ɒpˈtɒmɪtə/
noun
1.
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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optometer in Medicine

optometer op·tom·e·ter (ŏp-tŏm'ĭ-tər)
n.
An instrument for determining the refraction of the eye.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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