Manufacture of ophthalmic optical equipment

Title: Manufacture of ophthalmic optical material Includes the manufacture of lenses (contact lenses, non-correcting glass lenses, etc.) and other ophthalmic optics elements (polarizing materials in sheets or plates, etc.), glasses for correction, protection and similar artifacts (sunglasses, telescopes, monoculars, etc.). Includes the manufacture of frames, accessories, parts and pieces for the optical material of this activity. Does not include:  Manufacture of non-optically processed glass elements (23150);  Manufacture of optical instruments for measurement and control (26701);