Introduction: The prevalence of glaucoma and cataracts has been rising. The crowded anterior segment architecture that results in appositional contact between the trabecular meshwork and the peripheral iris is the cause of primary angle closure. A technique to control intraocular pressure and deepen the anterior chamber is lens extraction. Objectives: To evaluate intraocular pressure changes in narrow angle eyes following phacoemulsification with intraocular lens implantation. Methodology: The study was carried out between March 2015 and August 2017 at Department of Ophthalmology of Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka, Bangladesh on patients diagnosed with narrow-angle who also developed cataract. A narrow angle was defined as an anterior chamber angle grading of 2 or less on Shaffer grading in three or more quadrants. In accordance with the inclusion and exclusion criteria, a sample from the study population was drawn using the purposive type sampling technique. Participants in this prospective trial had foldable lens implantation after phacoemulsification surgery. Goldman applanation tonometry was done prior to surgery as well as on the tenth and thirtieth postoperative day. Results: The study included thirty eyes from 29 individuals, with a male to female ratio of 1:1 and an overall mean age of 62.03±8.95 years. Preoperative IOP was 13.66±1.69 mm Hg on average. The mean IOP at the 10th and 30th POD was 11.83±2.21 mm Hg and 11.00±2.07 mm Hg, respectively. At the final follow-up, the mean IOP drop was 2.66 mm Hg (p<0.05). Conclusion: In individuals with narrow angles, phacoemulsification combined with posterior chamber intraocular lens implantation can lower intraocular pressure. These results support the notion that phacoemulsification combined with foldable IOL implantation is a useful technique for reducing intraocular pressure.