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.
1886, from optometer (1738), an instrument for testing vision, from opto- "sight," from Greek optos "seen, visible" (see optic) + -metry. Probably influenced by French optométrie.
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.
