optometer

Noun

op=tom=e=ter

CIDE DICTIONARY

optometer, n. [Optic + -meter.].

An instrument for measuring the distance of distinct vision, mainly for the selection of eveglasses. [1913 Webster]

optometer, n. an instrument for testing the refractive power and visual range of the eye.

Derivative

optometric adj. optometry n.

Etymology

Gk optos seen + -METER

For further exploring for "optometer" in Webster Dictionary Online

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