n.
Pronunciation: -tr ē
Function: noun
Etymology: International Scientific Vocabulary
Date: 1886
: the health-care profession concerned especially with examining the eye for defects and faults of refraction, with prescribing correctional lenses or eye exercises, with diagnosing diseases of the eye, and with treating such diseases or referring them for treatment
– op · to · met · ric \ ˌ äp-t ə - ' me-trik \ adjective