Haldan Keffer Hartline ( December 22 , 1903 -- March 17 , 1983 ) was an American physiologist who was a co-recipient ( with George Wald and Ragnar Granit ) of the 1967 Nobel Prize in Physiology or Medicine for his work in analyzing the neurophysiological mechanisms of vision .
Haldan Keffer Hartline ForMemRS ( December 22 , 1903 -- March 17 , 1983 ) was an American physiologist . He was a co-winner ( with George Wald and Ragnar Granit ) of the 1967 Nobel Prize in Physiology or Medicine for his work in analyzing the neurophysiological mechanisms of vision .