Make tools, fittings, and small metal pieces used in other products.
Inspects mounted eyeglasses for quality of work and compliance with prescription specifications, using precision optical measuring instrument: Examines frame for proper assembly, and for appearance of engraving and trim. Measures eyesize, temple length, and distance between lenses with ruler. Inspects alignment of lenses, nose pads, and temples with straightedge. Inspects lenses for color, seating in frame, and defects, such as striae, pits, and sharp edges. Examines lenses with power-determining and optical-centering instrument to ensure that optical center, focal center, power of lens, and refractive effect are in accordance with prescription. Returns defective articles for correction.