The results of 139 iridectomies performed for narrowness of the angle of the anterior chamber indicate that the operation can be helpful in patients with acute angle-closure of recent onset, with prolonged attacks of angle-closure, or even with underlying chronic open-angle glaucoma. Intraocular pressure below 25 mm Hg with or without medical therapy following iridectomy was achieved in 87% of all cases with acute angle-closure, including 77% of cases in which the attack had been present for longer than three days, in 80% of cases with chronic angle-closure glaucoma, and in 80% of cases with chronic open-angle glaucoma that had a superimposed angle-closure attack. Subsequent surgery was needed in 8% of the cases.
Murphy MB, Spaeth GL. Iridectomy in PrimaryClassification and Differential Diagnosis of. Arch Ophthalmol. 1974;91(2):114-122. doi:10.1001/archopht.1974.03900060120007