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optometer

[ op-tom-i-ter ]

noun

  1. any of various instruments for measuring the refractive error of an eye.


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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Word History and Origins

Origin of optometer1

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

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

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

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

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optoelectronicsoptometrist