SCIENCE AND MEDICINE - AMSLER Marc (1891 - 1968) - Autograph letter signed

Professor of ophthalmology at the University of Zurich. He developed a vision test (Amsler Gird) which, using a grid, enables patients to detect premonitory signs of macular degeneration in their own central vision.
Autograph letter signed Zurich, 22.10.1949 to Paul Langer. "M. de Rham m'écrit que mon don à la Caisse de Retraite doit paraître dans le “Lien”. Included: signed order with thanks Zurich, 26.06.1950. 1 p. In-8.