OBJECTIVE: The objective of this study was to examine is there difference in visual acuity, stage of angle closure and eye pressure before and after laser treatment in patients with narrow angle. STUDY DESIGN: Retrospective cohort study. PARTICIPANTS AND METHODS: A study was conducted on 40 patients who were treated during 2016 at the Department of Ophthalmology, University Hospital Osijek. Exclusion criteria were: secondary causes of angle closure and acute episodes of angle closure glaucoma (IOP: 40mmHg, with corneal edema and lower level of visual acuity). Demographic data (age, sex) and data important for study (visual acuity, stage of angle closure and eye pressure) before and after laser treatment are taken from medical records. RESULTS: The results obtained in this study show there is a statistically significant correlation between laser iridotomy and the decreased stage of angle closure. After laser iridotomy eye pressure is significant lower. The change in visual acuity is not noticed which is in accordance with the literature. Additional anti-glaucoma medicine-based therapy is not necessary in 62.5 % of the patients, which is a result in accordance with the international standards. CONCLUSION: Although it has been used for 20 years, because of excellent results the peripheral Nd: YAG laser iridotomy is a treatment of choice in narrow - angle eyes.