Manufacturing of ophthalmic focal lenses, prescription, ground and molded lens blanks (excluding retailing prescription eyeglasses in combination with the grinding of the eyeglass lenses to order on the premises)

FactoryRegistry lists 3,644 facilities whose primary industry classification is one of the 2 industries above. This is a list by industry, not a list of makers: Census reports that establishments in these industries produced ophthalmic focal lenses, prescription, ground and molded lens blanks (excluding retailing prescription eyeglasses in combination with the grinding of the eyeglass lenses to order on the premises), in the shares shown above, and does not say which establishments. Where a plant’s own website or a federal registry names what that plant makes, it appears on the plant’s own page with the source named.