Torp TL, et al. – This trial ascertained if retinal metabolism, estimated by retinal oximetry, could speculate the proliferative diabetic retinopathy (PDR) activity after panretinal laser photocoagulation (PRP). It was noted that the development of higher retinal venular and lower arteriovenular (AV) global oxygen saturation independently speculated the progression of PDR, regardless of the standard PRP. It could serve as a potential non–invasive marker of angiogenic disease activity.