Webster
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Webster’s Revised Unabridged Dictionary · 1913

Optometry

Op·tom′e·try, n. 1. (Med.) Measurement of the range of vision, esp. by means of the optometer.

2. As defined (with minor variations) in the statutes of various States of the United States: (a) "The employment of subjective and objective mechanical means to determine the accomodative and refractive states of the eye and the scope of its function in general." (b) "The employment of any means, other than the use of drugs, for the measurement of the powers of vision and adaptation of lenses for the aid thereof."

Webster’s Revised Unabridged Dictionary, Noah Porter, editor (Springfield, Mass.: G. & C. Merriam, 1913). Public domain. Text as transcribed by MICRA, Inc., from Project Gutenberg. Changed for Deep Dive Bible: Greek, which our source spelled in Latin letters, set in Greek letters; entries of one spelling merged into one article; Greek words our source left out (shown as “?”), read from the 1898 printing, from the same plates (the Library of Congress’s copy), where the place could be found with certainty. Of the others, 1,362 (a word or a single letter each) were inferred by AI from the context by the dictionary’s own rules and are marked with a wavy underline (tap or point at one to see the note); the rest, which could not be inferred with confidence, are left as “?”.