Ragnar Arthur Granit was a Finnish and Swedish neurophysiologist who was awarded the Nobel Prize in Physiology or Medicine in 1967 along with Haldan Keffer Hartline and George Wald "for their discoveries concerning the primary physiological and chemical visual processes in the eye". Granit carried out fundamental research on the retina and the physiological mechanisms of colour vision at the University of Helsinki, and later investigated the neural control of movement at the Karolinska Institutet in Stockholm. The Nobel Prize in Physiology or Medicine 1967, announced October 18, 1967. Ragnar Granit, Keffer Hartline, and George Wald, “for their discoveries concerning the primary physiological and chemical visual processes in the eye”. Ragnar Granit: born 1900, Helsinki, Russian Empire (now Finland). Keffer Hartline: born 1903, Bloomsburg, PA, USA. George Wald: born 1906, New York, NY, USA. Wiki link Wiki link Wiki link Data: the Nobel Foundation (CC0).