Fielmann Group AG engages in the operation of and investment in optical businesses and hearing aid companies. The company is headquartered in Hamburg, Hamburg and currently employs 17,317 full-time employees. The firm's optical product range includes frames, lenses, sunglasses, contact lenses, safety eyewear, related articles, accessories and all kinds of merchandise including bifocal and varifocal optical glasses. The firm operates through numerous subsidiaries and retailers located in Germany, Switzerland, Luxembourg, the Netherlands and Poland, among others. The production is conducted by Rathenower Optik GmbH. The firm is subsidiary of Korva SE, which is part of Inter-Optik GmbH & Co KG.