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

Word History and Origins

Origin of optometer¹

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

Example Sentences

The owl was Billy’s optometer in his office in Ilium.

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An optometer is an instrument for measuring refractive errors in eyes— in order that corrective lenses may be prescribed.

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Opsiometer, op-si-om′e-tėr, n. an optometer.

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

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

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