Ideal Inc. - A supplier of precision mechanical eyewear components and parts for metal or plastic frames. Production and custom parts available. Cerium Optical Products - Distributor and manufacturer of optical products. Altomed Ltd - Supplier of surgical instrumentation for ophthalmic surgery. Includes an online store. Vitrectomy Solutions - Provider of medical equipment for surgical procedures requiring extended facedown recovery including macular hole and retinal detachment. M&S Technologies - Computerized visual acuity test systems for ophthalmology, optometry, pediatrics, and research. Vision screening eye charts include random optotypes. Hoya Vision North America - Providing eye care products and services to dispensing optometrists, ophthalmologists and opticians. LCA-Vision Inc. - Designs and develops multi-specialty surgery and refractive eyecare centers which utilize minimally invasive high-tech and laser surgical techniques. (Nasdaq: LCAV). Bell Optical Laboratories - Network of full service wholesale optical labs based in Dayton, OH. Alcon Laboratories - Discovering and manufacturing ophthalmic pharmaceutical, surgical, and vision care products.