Paul Silex (20 March 1858, Gorgast – 20 January 1929, Berlin) was a German ophthalmologist. He is known for contributions made involving war-related blindness.
He studied medicine at the Universities of Halle, Berlin and Breslau, obtaining his doctorate in 1883. Afterwards he served as an assistant to ophthalmologist Ludwig Laqueur (1839-1909) in Strasbourg, followed by several years (1884-1897) as an assistant to Karl Ernst Theodor Schweigger (1830-1905) in Berlin.
He received his habilitation in 1890, becoming an associate professor in 1897. In Berlin he opened a private clinic at St. Maria Victoria-Krankenhaus.