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MD, Ophthalmology Department of Başkent University, Medicine School, Ankara, Turkey DOI : 10.37844/glauc.cat.2021.16.30 Optical coherence tomography angiography (OCTA) is a new device that provides noninvasive examination of the vascular structures in the optic disc, peripapillary area and macula. OCTA allows qualitative and quantitative examination of retinal vascular structures in layers and in three dimensions. It is now known that vascular damage progresses in both the peripapillary and macular superficial layers in patients with glaucoma as the disease stage progresses. This vascular damage is associated with structural tests in the early stages and functional tests in the late stages. Repeatability and reproducibility of OCTA is good, although it can be affected by subject-related, disease-related and eye-related factors. Recent studies have shown that OCTA can be used in the follow-up of progression in glaucoma patients. Keywords : Glaucoma, Optical coherence tomography angiography, Diagnosis