Influence of Phacoemulsification on Intraocular Pressure in the Eye after Trabeculectomy

Abstract

Aim: The aim of this study was to question whether there is a difference in the change of intraocular pressure (IOP) between groups of participants, achieved by phacoemulsification after trabeculectomy, considering the height of IOP at beginning. As well as whether there is a decreased necessity for topical antiglaucoma (ATG) medications.

Participants and methods: Study was conducted on 26 participants submitted to cataract surgery after trabeculectomy at the Clinic for Eye Diseases in Osijek (January 2017 - December 2019). IOP values were noted at day zero, seventh day, after a month and six months after patients underwent cataract surgery with phacoemulsification; also, number and type of topical medications.

Results: Historic cohort study included 26 patients (19 women, 7 men). Statistically significant decrease of IOP was noticed from day zero and six months after (Friedman's test, P < 0.001). Significant difference was in measured value of IOP at day zero and the first day (Friedman's test, P < 0.05). No statistically significant difference was in participant groups according to IOP (Marginal Homogeneity test, P = 0.06).

Conclusion: Trabeculectomy alone and trabeculectomy combined with phacoemulsification, are justified procedures to achieve a decrease in the IOP value and its regulation with subsequent possibility of decrease in usage of local ATG therapy. Phacoemulsification after trabeculectomy ensures an additional decrease of the IOP.

Key words: glaucoma; intraocular pressure; phacoemulsification; trabeculectomy