The simplicity of Charleux's technique for peripheral iridectomy is underlined. In a lot of 15 eyes with acute angle closure glaucoma, the i.o.p. after surgery was under 21 mm Hg when the attack lasted less than 48 hours. In a second group of 20 eyes with occludable angle/congener eyes suffered attacks/peripheral iridectomy with Charleux's technique prevented acute angle closure/56 months of postoperative observation.