Johann Friedrich Horner

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Johann Friedrich Horner (27 March 1831 - 20 December 1886) was an ophthalmologist based at the University of Zurich, Switzerland. After receiving his medical degree from Zurich in 1854, he did additional study in Vienna and Berlin. While in Berlin, he was an assistant to Albrecht von Graefe (1828-1870). It was during this time that Horner decided on becoming an ophthalmologist. He returned to Zurich in 1856, and later opened his own eye clinic named Hottinghof. Horner became a full professor of ophthalmology in 1873. After his death in 1886, his position at the University of Zurich was filled by Otto Haab (1850-1931).

Horner's syndrome, a disorder of the sympathetic nervous system is named after him following his description of the condition in 1869. Horner published approximately 40 papers concerning eye disorders.