the practice or profession of examining the eyes, by means of suitable instruments or appliances, for defects in vision and eye disorders in order to prescribe corrective lenses or other appropriate treatment.

1890–95; opto- + -metry

optometrical [op-tuh-me-tri-kuhl] , adjective
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World English Dictionary
optometry (ɒpˈtɒmɪtrɪ)
the science or practice of testing visual acuity and prescribing corrective lenses

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Word Origin & History

1886, from optometer (1738), an instrument for testing vision, from opto- "sight," from Gk. optos "seen, visible" + Gk. metron "measure" (see meter (2)). Probably influenced by Fr. optométrie.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

optometry op·tom·e·try (ŏp-tŏm'ĭ-trē)
The health care profession concerned with examination, diagnosis, and treatment of the eyes and related structures, and with determination and correction of vision problems using lenses and other optical aids.

op·tom'e·trist n.
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Example sentences
We might ask why home-schooling, dentistry, and optometry seem to be such effective and affordable endeavors.
Behavioral optometry wins converts despite some raised.
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