Ewald Hering

Karl Ewald Konstantin Hering (1834 to 1918) was a German physiologist best known for his research on color vision, binocular perception, eye movements and hyperacuity, and for proposing opponent color theory in 1892. Born in Alt-Gersdorf in the Kingdom of Saxony, the son of a Lutheran pastor, he studied at the University of Leipzig and completed his M.D. there in 1860. He practiced as a physician in Leipzig while publishing his own mathematical derivation of the horopter, independently of Hermann von Helmholtz. He later held a professorship at the military academy in Vienna, succeeded Jan Evangelista Purkinje at the university in Prague in 1870, and in 1882 became the first rector of the German Charles-Ferdinand University there.