optometry
n.
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.
〔李〕[opt;-o-;-metryn.] n.视力测定（法）； 验光配镜业 ←op,opt (GK ops,optos)=eye, sight 眼睛，视力