Jørgen Krohn1,2, Kristoffer Ommundsen2, Geir Hanken3. 1. Department of Clinical Medicine, Section of Ophthalmology, University of Bergen, Bergen, Norway. 2. Department of Ophthalmology, Haukeland University Hospital, Bergen, Norway. 3. Department of Ophthalmology, Møre and Romsdal Hospital Trust, Ålesund Hospital, Ålesund, Norway.