Keeler Instruments has been manufacturing ophthalmic instruments since 1917. The company continues to be a market leader with its innovative instruments. This has been achieved through its continuous program of customer involvement in the design process to ensure the instruments meet the rigorous demands of daily practice. Keller still manufactures and assembles its instruments in the United Kingdom. The instruments combine optical precision, high-quality illumination, ergonomic design and lightweight, durable materials to provide customers with the best possible choice of equipment. Keeler s corporate headquarters is in Broomall, Pa.