Johann Friedrich Dieffenbach (1 February 1792 – 11 November 1847) was a German surgeon. He was born in Königsberg and died in Berlin.Dieffenbach specialised in skin transplantation and plastic surgery. His work in rhinoplastic and maxillofacial surgery established many modern techniques of reconstructive surgery. His endeavours comprehended subcutaneous operations such as tenotomy, the surgical division of a tendon. Before the discovery of blood typing and blood matching, Dr. Dieffenbach researched blood transfusion, about which he published Die Transfusion des Blutes und die Infusion der Arzneien in die Blutgefässe (1828). In 1839, Dieffenbach performed the first successful myotomy for the treatment of strabismus on a seven-year old boy with esotropia.