optometer

[ op-tom-i-ter ]
/ ɒpˈtɒm ɪ tər /

noun

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

Origin of optometer

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

Words nearby optometer

optional, optionee, opto-, optoelectronics, optokinetic, optometer, optometrist, optometry, optomyometer, optophone, optotype

Example sentences from the Web for optometer

  • 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

  • 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

British Dictionary definitions for optometer

optometer
/ (ɒpˈtɒmɪtə) /

noun

any of various instruments for measuring the refractive power of the eye

Medical definitions for optometer

optometer
[ ŏp-tŏm′ĭ-tər ]

n.

An instrument for determining the refraction of the eye.