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ophthalmometer

American

[of-thuhl-mom-i-ter, -thuh-, -thal-, op-] / ˌɒf θəlˈmɒm ɪ tər, -θə-, -θæl-, ˌɒp- /

noun

an instrument for measuring the reflection of an image on the surface of the cornea and other capacities of the eye, used chiefly for determining the presence and degree of astigmatism.

Other Word Forms

Etymology

Origin of ophthalmometer

First recorded in 1835–45; ophthalmo- + -meter

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.