Figure 4: Changes in retinal microcirculation registered by optical coherence tomography angiography (OCTA) after decrease of intraocular pressure (IOP). Raw OCTA scans showing hypointense flow signal bands at high IOP (a) and their disappearance after decrease of IOP (b). Vessel density map of deep capillary plexus showing spotted grid pattern of hypointense flow signal at high IOP (c) and normalization of retinal perfusion and increase of vessel density after decrease of IOP (d).