Knickelbein JE, et al. – A retrospective cohort study is performed to examine the utility of utilizing montaged optical coherence tomography (OCT) thickness maps to monitor perivascular thickness as a marker of vasculitic activity in patients with large–vessel retinal vasculitis. Assessing large–vessel perivascular thickness on OCT scans may be a helpful method for non–invasively monitoring posterior pole large–vessel retinal vasculitis.