“… 1 , 2 , 3 The most common causes of NVG include proliferative diabetic retinopathy (PDR), ischemic retinal vein occlusion, and ocular ischemic syndrome, which are associated with neovascularization and fibrovascular membrane formation of the iris and anterior segment, leading to secondary angle closure and intraocular pressure (IOP) elevation. 4 , 5 Surgical interventions indicated to treat NVG are divided into two major categories, one is anti-glaucoma surgery, such as glaucoma valve implantation, filtration surgery, ciliary body freezing or photocoagulation, and the other is vitreous surgery, which is the targeted treatment of primary diseases, such as vitrectomy, pan-retinal photocoagulation (PRP), anti-vascular endothelial growth factor (VEGF) injection, etc. 6 , 7 However, because of the complexity and specificity of the primary diseases, none of these procedures have been found to be superior, and most of them do not offer long-term effect.…”