The Carl Zeiss company is a German manufacturer of optical systems, industrial measurements and medical devices founded in Jena in 1846 by Carl Zeiss, Ernst Abbe, and Otto Schott. Due to the partition of Germany following World War II there are currently two parts, the Carl Zeiss AG located in Oberkochen with important subsidiaries in Aalen, Göttingen and Munich and Carl Zeiss GmbH located in the foundation city Jena.

The organisation is named after a founder, the German optician Carl Zeiss (1816–1888).
video glasses
Carl Zeiss is the premier company of the Zeiss Gruppe, one of the two large divisions of the Carl-Zeiss-Stiftung. The Zeiss Gruppe is located in Heidenheim and Jena.

The other division of the Carl Zeiss Foundation, the glass manufacturer Schott AG and Jenaer Glaswerk, is located in Mainz and Jena.

Carl Zeiss is one of the oldest existing optics manufacturers in the world.

Zeiss Inc manufactures the Cinemizer video glasses.