This U.S. industry comprises establishments primarily engaged in one or more of the following: (1) manufacturing optical instruments and lens, such as binoculars, microscopes (except electron, proton), telescopes, prisms, and lenses (except ophthalmic); (2) coating or polishing lenses (except ophthalmic); and (3) mounting lenses (except ophthalmic). Manufacturing ophthalmic focus lenses--are classified in U.S. Industry 339115, Ophthalmic Goods Manufacturing; Manufacturing electron and proton microscopes--are classified in U.S. Industry 334516, Analytical Laboratory Instrument Manufacturing; Manufacturing molded plastics lens blanks--are classified in U.S. Industry 326199, All Other Plastics Product Manufacturing; and Manufacturing molded glass lens blanks--are classified in U.S. Industry 327212, Other Pressed and Blown Glass and Glassware Manufacturing.
