Introduction: Cataract surgery in patients with Primary angle closure or very narrow angles poses a unique set of challenges and risks. Laser peripheral iridotomy (LPI) relieves the pupillary block and is most effective intervention for the majority of cases of PAC. Objectives: We conducted a prospective randomized controlled trial to compare the role of prophylactic LPI in cataract surgery with occludable angles. Materials and methods: Total of 60 eyes of 60 patients were recruited with 30 eyes each in group. In group A, prophylactic LPI was done before the surgery, in Group B surgery was done without LPI. The outcome was intraocular miosis during the surgery including other intraoperative safety parameters like iris prolapse, difficulty in capsulorrhexis, increased AC fluctuation, rise in posterior vitreous pressure and PCR. The surgeons were given a questionnaire at the end of surgery to make a note of the above mentioned parameters. Intraoperative miosis was present in 13.3% patients in group A and 20% in group B. Surgeon comfortability was not there in 13 cases, out of which 9 (30%) were without LPI and 4 (13.33%) were with LPI. Conclusions: This is the first prospective study to evaluate the role of YAG PI in preventing intraoperative complications in cataract patients with occludable angles, a preoperative LPI has potential to decrease intraoperative complications. The present study was conducted with experienced surgeons. So, a further study can be planned with different levels of surgeon experience to find out if a true benefit exists with prophylactic LPI.