Johann Adam Schmidt (12 October 1759 – 19 February 1809) was a German-Austrian surgeon and ophthalmologist who was a native of Aub, a town near Würzburg. He began his medical career as an army Unterchirurg (under surgeon), and later studied ophthalmology under Joseph Barth (1745–1818) in Vienna. In 1795 he became a professor at Josephs-Akademie in Vienna, where he gave lectures on several subjects in medicine.