Bible Dictionaries
Ophthalmometer
Webster's Dictionary
(n.) An instrument devised by Helmholtz for measuring the size of a reflected image on the convex surface of the cornea and lens of the eye, by which their curvature can be ascertained.
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Bibliography Information
Webster, Noah. Entry for 'Ophthalmometer'. Noah Webster's American Dictionary. https://www.studylight.org/dictionaries/eng/web/o/ophthalmometer.html. 1828.