Background: Both Phaco alone and Phaco-trab resulted in changes of the drainage angle, anatomy of the anterior chamber and reduction of intraocular pressure (IOP). The present study aimed to evaluate anterior segment Pentacam changes before and after phacoemulsification versus combined Phacotrabeculectomy in primary angle-closure glaucoma. Methods: This comparative, prospective, randomized controlled interventional study was conducted on 40 cases with primary angle closure glaucoma associated with cataract grade II or more, visual field loss compatible with cataract density admitted and underwent surgery. The study eyes were divided randomly into two groups; group (A) included cases that underwent standard phacoemulsification only while group (B) included cases that underwent combined phacoemulsification and trabeculectomy and both groups underwent pre and post-operative pentacam. Results: There were non-discernible differe-nces between both groups regarding baseline UCVA, BCVA, K1, K2, K max over time, astigmatism, apex pachymetry, thinnest part corneal volume and anterior chamber depth or the follow-up at 1 week, 1 month, 3 months and 6 months. There was discernible difference between both groups regarding baseline anterior chamber angle and chamber volume follow-up at 1 month, 3 months and 6 months. No discernible difference was found regarding safety and efficacy between both groups. Conclusions: It's possible that both methods are similarly effective in curing PACG.There are non-significant pentacam changes between both procedures among cornea(k1,k2,k max, apex pachymetry, thinnest part), among anterior chamber (Ac depth, Ac angle, Chamber volume)