optometer

 : 
Noun
 : 
op=tom=e=ter

CIDE DICTIONARY

optometern. [Optic + -meter.].
     An instrument for measuring the distance of distinct vision, mainly for the selection of eveglasses.  [1913 Webster]

OXFORD DICTIONARY

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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