Carl Zeiss started making microscopes in 1846, and after 20 years he began a legendary collaboration with Ernest Abbe, who revolutionized the manufacturing process of optics, which allowed Zeiss to quickly become one of the world's biggest produces in the optics industry. World War II split Zeiss into two companies, but with the political changes in 1989-1990 the East and West Zeiss companies were able to reunite into today's Carl Zeiss Sports Optics. With an international workforce of over 24,000 employees in more than 30 countries Zeiss continues to follow their motto of "We Make it Visible." With such a diverse workforce spread across the world, in 2003 Zeiss started "Innovation Days," where the best and brightest engineers are brought together to discuss new ways to push the world of optics forward. Focused on innovation and maintaining their position as the best in the optical world, Zeiss continues to pursue optical perfection and making the world visible.