ALPI is effective in patients with plateau iris syndrome and acute angle closure glaucoma but there is less published about its effectiveness in secondary angle closure. Therefore, we are going to evaluate this procedure in those patients that did not achieve a satisfactory clinical angle opening despite patent laser peripheral iridotomy, as long as there was no contraindication for a new laser procedure and provided that cataract surgery is not viable, as in clear lens or patients not willing to undergo surgery.