Fielmann Aktiengesellschaft invests in and operates optical and hearing aid businesses in Germany, Switzerland, Austria, and internationally. The company designs, manufactures, distributes, and retails visual aids and other optical products, including glasses, frames, lenses, sunglasses, contact lenses, and related articles and accessories, as well as hearing aids and accessories. It operates a network of 723 stores, including 597 in Germany, 42 in Switzerland, and 37 Austria. The company also offers its products through online stores. The company is headquartered in Hamburg, Germany. Fielmann Aktiengesellschaft is a subsidiary of Korva SE.