Pain was estimated by the patient using a simple pain score: no pain =0; that does not interfere with the surgical technique, discomfort=1; the surgical technique is performed with difficulty, pain=2; the surgeon is unable to continue the surgical technique . The scoring was done during different stages of surgery: lid retraction while inserting a speculum, tolerance to the microscope light, corneal incision, intraocular lens insertion, tucking of footplates, irrigation aspiration (I/A )of viscoelastic, peripheral iridectomy.