Optical coherence tomography (OCT) is regarded as standard diagnostic technique in various subdisciplines in ophthalmology today. In 1990, by using white light interferometry, Professor Adolf Friedrich Fercher (1939–2017) realized a two-dimensional picture of the fundus (the part of a hollow organ farthest from the opening) of a living human eye for the first time. He presented his results at the conference of the “International Commission for Optics,” August 1990 in Germany. Fercher’s visionary ideas laid the basis for the development of optical coherence tomography.