Bernhard Kayser (6 August 1869, in Bremen – 11 May 1954, in Stuttgart) was a German ophthalmologist.
Afterwards, he worked as an intern in Tübingen and as an assistant physician in Freiburg im Breisgau.
He later worked as a physician in Brandenburg and Bremen, during which time, he developed an interest in ophthalmology.
For many years he was editor of the essay section of the Klinische Monatsblätter für Augenheilkunde.
Kayser described the condition in a 1902 paper titled Über einen Fall von angeborener grünlicher Verfärbung des Cornea.