{"id":"S85095175","label":"Optical trade","description":"Here are entered works on the optometrist's and optician's trade. Works on the manufacture of optical instruments and systems for scientific and engineering applications are entered under [Optical industry.]","source_url":"https://id.loc.gov/authorities/subjects/sh85095175","normalized_label":"optical trade","broader":[],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85095175","provider":"lcsh","revision":"f8f836b2a4a8351e","taxonomy_revision":"f050b5d4780b1289","title":"Optical trade","url":"/topics/S85095175","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"290702096611821056","address_version":"morton4x16-v1","coordinates":[0,20,18892,7168],"answer_status":"Directory metadata; local answer requires separate source review","truth_status":"Subject descriptor, not a factual answer or a demonstrated knowledge gap","reviewed_answer":null}