Meta-Analysis of Phacoemulsification and Laser Peripheral Iridotomy in the Treatment of Primary Angle-Closure Glaucoma

Background. In this meta-analysis, we aimed to systematically compare the efficacy and safety of phacoemulsification and laser peripheral iridotomy (LPI) in the treatment of primary angle-closure glaucoma (PACG). Method. We searched PubMed, MEDLINE, EMBASE, the Cochrane Library, the Chinese Journal Full-text Database (CNKI), the Wanfang database, and the China Science and Technology Journal Database for randomized controlled trials (RCTs) of phacoemulsification and LPI in the treatment of PACG published up to September 30, 2022. Postoperative intraocular pressure (IOP), anterior chamber depth (ACD), complications, corneal endothelial cell count, and best-corrected visual acuity (BCVA) were compared. The effective quantity of measurement data was measured by the mean difference (MD) and 95% confidence interval (CI). The effect of counting data was measured by the odds ratio (OR). Result. A total of 1731 potential studies were identified, and after screening, 8 RCT studies were included. The results of the meta-analysis showed that, compared to the LPI group, the patients in the phacoemulsification group showed lower IOP six and twelve months after operation (MD-3.39, 95% CI -4.15 similar to -2.63, P<0.00001; -2.29, -3.52 similar to -1.06, 0.0003). The ACD in the phacoemulsification group was significantly deeper than that in the LPI group (1.59, 1.10 similar to 2.09, 0.00001). Meanwhile, the incidence of complications in the phacoemulsification group was lower than that in the LPI group (OR = 0.46, 0.29 similar to 0.72, 0.0006). There was no statistically significant difference between the phacoemulsification group and the LPI group in corneal endothelial cell count and BCVA at 6 and 12 months after operation (P=0.38; 0.11; 0.81). Conclusion. Compared with LPI, phacoemulsification is safer and more effective in the treatment of PACG, especially in controlling IOP and minimizing postoperative complications.