Established in 1932, General Scientific Corporation (GSC) is one of the leaders in optical technology. Based in Ann Arbor, Mich., the company is a full-service manufacturer of optical components and assembly offering to its wide customer base. The company offers optics to a variety of industries, such as clinical, aerospace, commercial and scientific applications. General Scientific Corporation (GSC) was purchased by Perfect optics in 1989. Presently, the firm supplies optics ranging from complex lens assemblies to electro-optical instruments. It serves to the medical optics market with its own line of surgical telescopes.