This industry comprises establishments primarily engaged in manufacturing medical equipment and supplies. Examples of products made by these establishments are laboratory apparatus and furniture, surgical and medical instruments, surgical appliances and supplies, dental equipment and supplies, orthodontic goods, dentures, and orthodontic appliances. Manufacturing laboratory instruments, X-ray apparatus, electromedical apparatus (including electronic hearing aids), and thermometers (except medical)--are classified in Industry 334510, Navigational, Measuring, Electromedical, and Control Instruments Manufacturing; Manufacturing molded glass lens blanks--are classified in Industry 32721, Glass and Glass Product Manufacturing; Manufacturing molded plastics lens blanks--are classified in Industry 32619, Other Plastics Product Manufacturing; Retailing and grinding prescription eyeglasses--are classified in Industry 446130, Optical Goods Stores; and Manufacturing sporting goods helmets and protective equipment--are classified in Industry 33992, Sporting and Athletic Goods Manufacturing.