VEGFA and retinal vein occlusion: The effectiveness of the dexamethasone implant in patients previously treated with anti-VEGF therapy was demonstrated in a study by Tservakis et al. They reported that nine out of ten patients with retinal vein occlusion (RVO), who had shown inadequate response to anti-VEGF treatment, exhibited improved BCVA and reduced CRT following dexamethasone implant treatment [29].