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Trabeculectomy with the extraction of the crystalline in a single operating tempo, represents a progress in the solving of two affections through a single intervention. Of the total of 101 cases of open-angle glaucoma operated and analysed on 21 patients, trabeculectomy was practised in the extraction of the crystalline (21%). The ocular tension before the operation was between 21-30 mm Hg, on 15 patients, 31-40 mm Hg, on 4 patients and over 41 mm Hg on 2 patients. As to the visual acuity, it was below 1/50, due to the opacity of the crystalline and the advanced stage of the glaucoma. The technicality varied, according to the operator--either classical Cairns trabeculectomy, or Franimopoulos-protected trepano-trabeculectomy followed by the extraction of the intracapsulated crystalline. Small postoperation hemorrhages appeared in 6 of the cases observed in the anterior chamber and 4 small hemorrhages in the vitreous body were resorbed in 7-10 days. In all cases under observation, the postoperative ocular tension kept within 11 to 17 mm Hg. The extraction of the crystalline with trabeculectomy in open-angle glaucoma is easily performed and complications are not more frequent than in the simple extraction of the crystalline.