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dioptometer

[ dahy-op-tom-i-ter ]
/ ˌdaɪ ɒpˈtɒm ɪ tər /

noun Ophthalmology.

an instrument for measuring the refraction of the eye.

Nearby words

diophantus, diopside, diopsimeter, dioptase, diopter, dioptometer, dioptre, dioptric, dioptric aberration, dioptrics, dior

Origin of dioptometer

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for dioptometer

dioptometer

/ (ˌdaɪɒpˈtɒmɪtə) /

noun

an instrument for measuring ocular refraction
Derived Formsdioptometry, noun

Word Origin for dioptometer

from di- ² + opt (ic) + meter
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012