dioptometer

dioptometer

[dahy-op-tom-i-ter]
noun Ophthalmology.
an instrument for measuring the refraction of the eye.

Origin:
di-3 + opt(ic) + -o- + -meter

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World English Dictionary
dioptometer (ˌdaɪɒpˈtɒmɪtə)
 
n
an instrument for measuring ocular refraction
 
[from di-² + opt(ic) + meter]
 
diop'tometry
 
n

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