Jannik Petersen Bjerrum

Who was Jannik Petersen Bjerrum?

Jannik Petersen Bjerrum was a Danish ophthalmologist who was a native of Skærbæk, a town in the southernmost part of Jutland. In 1864 Skærbæk became part of Germany due to consequences of the Second Schleswig War.

In 1876 he received his medical doctorate from the University of Copenhagen, and in 1879 became an assistant to Edmund Hansen Grut at the Havnegade eye clinic. After Grut's retirement in 1896, he became director of the clinic, as well as being the second professor of ophthalmology at the University of Copenhagen, a position he would maintain until his retirement in 1910.

Bjerrum made contributions regarding pathogenetic research of glaucoma, and performed extensive investigations involving campimetry. He was interested in the correlation between visual perception of form and the resolving power in localized regions of the retina. He was particularly focused on the subtleties of the central 30° of the visual field rather than the standard perimetry tests that many of his contemporaries favored.