Essilor of America is one of the leading providers of eyeglass lenses in the United States that has been operational for more than 150 years. It is a manufacturer and wholesale distributor of optical lenses that specializes in ophthalmic lens production and wholesale optical laboratory operations. The company produces a range of technologically advanced lenses, such as Essilor's Varilux, Crizal, Thin&Lite, Airwear and Transitions. Essilor of America operates a network of independent laboratories that serve opticians, optometrists and ophthalmologists nationwide. It employs a work force of more than 8,500 staff members in over 115 prescription laboratories and various manufacturing facilities, distribution centers, and research and development centers. With a location in Groveport, Ohio, the company is a fully owned subsidiary of Paris-based Essilor International, which is one of the largest business units in the world.