This work aimed to compare the effectiveness of Ahmed valve implant versus sub-scleral trabeculectomy with mitomycin C in patients with neovascular glaucoma pretreated with intra-vitreal ranibizumab and panretinal photocoagulation. Methods: prospective comparative non-randomized controlled study including patients with NVG pretreated with intra-vitreal ranibizumab and PRP then evenly distribute...