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optometer Syllabification: op·tom·e·ter
Pronunciation: /äpˈtämədər/

Definition of optometer in English:


An instrument for testing the refractive power of the eye.
Example sentences
  • He immediately became hypermetropic (long sighted) in that eye, but using his optometer found ‘the same inequality in the horizontal and vertical refractions as without the water’.
  • We have developed an optometer to measure the ocular astigmatism of human eyes and tested its performance.


Mid 18th century: from Greek optos 'seen' + -meter.

Words that rhyme with optometer

accelerometer, anemometer, barometer, gasometer, geometer, manometer, micrometer, milometer, olfactometer, pedometer, photometer, pyrometer, speedometer, swingometer, tachometer, thermometer

Definition of optometer in:

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