Duffens Optical, located in Topeka, Kan., is a branch of Duffens Optical, which operates a network of optical laboratories that use advanced surfacing, coating and finishing equipment to provide services to eye care practitioners and their patients. The parent company offers a range of products, including designs, treatment, materials, sunwear, contact lenses and frames. It also offers a range of services and tools through its team of American Board of Opticians-certified sales consultants for its marketing programs, including new innovations in Web-oriented technologies. Duffens Optical operates a Web site that offers clients secure access to its laboratories and production and delivery systems 24 hours, seven days a week. Additionally, its Stimuleye Education Series offers in-office training. Duffens Optical, established in 1919, operates a network of more than 10 laboratories.