Background Diabetic eye disease is the most frequent complication among the 320,000 Danes with diabetes. The formation of new vessels (PDR) in the inner part of the eye (retina) is a feared complication and a leading cause of blindness, since these vessels are fragile and often cause bleeding within the eye. Peripheral retinal laser treatment (PRP) halves the risk of blindness, but often comes with a high prize. The peripheral part of the retina is responsible for the visual field and the night vision, and PRP limits these abilities (i.e. loss of driving license).