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Bible Dictionaries
Opsiometer

Webster's Dictionary

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(n.) An instrument for measuring the limits of distincts vision in different individuals, and thus determiming the proper focal length of a lens for correcting imperfect sight.

Bibliography Information
Webster, Noah. Entry for 'Opsiometer'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​o/opsiometer.html. 1828.
 
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