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.

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

Spin the wheel and learn a new word!

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