Effect of Cataract Surgery on Intraocular Pressure in Glaucoma Patients
Purpose: To determine the change in intraocular pressure after cataract surgery in patients diagnosed with glaucoma.
Study Design: Interventional case series.
Place and Duration of Study: Glaucoma Clinic. Al-Ibrahim Eye Hospital (AIEH) Karachi, Pakistan from May to October, 2019.
Methods: Thirty-eight patients diagnosed with glaucoma and cataract and registered in glaucoma clinic were recruited for this study. Inclusion Criteria was age > 41 years and patients diagnosed with primary open/closed angle glaucoma and cataract. Patients with secondary glaucoma, history of trabeculectomy and any other ocular diseases were excluded from the study. Pre-operative assessment was done for phacoemulsification. In post-operative examination, first and second follow-up IOP was measured. Data analysis was done on statistical package for social science (SPSS) version 20.0. Statistical changes were present in the form of bar chart, frequency and graphs. The mean standard deviation for pre-operative, post-operative 1st and 2nd follow-up IOP was calculated.
Results: A total of 38 participants and 48 eyes satisfied the inclusion criteria. Out of 48 eyes, 39 (81.3%) eyes were diagnosed with Primary open angle glaucoma and 9 (18.8%) eyes with Primary Angle Closure Glaucoma. The pre-operative mean IOP was 16.56 ± 6.67 mm Hg and post-operative mean IOP at first follow-up was 13.39 ± 4.04 mm Hg. At second follow-up at one-month mean IOP was 12.14 ± 2.28 mm Hg.
Conclusion: Phacoemulsification produces a useful decrease in IOP in glaucoma patients.
Key Word: Glaucoma, Cataract, Phacoemulsification, Intraocular Pressure.
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