This study is a continuum of the clinical project IMPETUS 2018 - DETECT, which aimed to identify the factors that were important for a successful PRP treatment of PDR. In the study the investigators prospectively followed 65 patients with newly diagnosed PDR. All patients received baseline navigated PRP, as in Scandinavia only offered at Odense University Hospital (OUH). Navigated panretinal laser with a Navilas® laser ensures optimized treatment (12), shorter treatment (13) and increased patient comfort (12-14). Treatment effect was investigated at month three and six, and if necessary, treatment was supplied. All the patients venous retinal oxygen saturation was measured to study whether this had any therapeutic value.