German ophthalmologist, born on October 28, 1874, died in 1943. Carl Behr studied at Freiburg, Kiel, Munich and Berlin and received his Ph.D. in Kiel in 1900. He is an intern and assistant physician at the Eppendorfer and St-George hospitals in Hamburg and the eye clinic at Keele University. In 1910, he was engaged in eye science research there. In 1916 he became an extraordinary professor in Kiel and in 1923 he was appointed professor of ophthalmology at Hamburg. His area of particular interest is neuro-ophthalmology, which depicts several new entities, including those now named after him. Behr's optic atrophy: a recessive form of optic atrophy that may occur alone or may be associated with deafness, diabetes, and neurological complications.