Real World Evidence of Xen45 Gel Implant in Pseudoexfoliation Glaucoma

Inclusion Criteria: Data will be collected for all patients with pseudoexfoliation glaucoma (PXFG), ocular hypertension (OHT) and pseudoexfoliation syndrome, POAG and other secondary open angle glaucoma (OAG) diagnosed, who underwent surgery from 2018 to 2022. Patients should be candidates for filtering glaucoma surgery for the following indications: * uncontrolled intraocular pressure (IOP) * intolerance or non-adherence to topical treatment * glaucoma progression despite topical therapy * surgical cataract patients undergoing phacoemulsification, who were treated with two or more hypotensive drugs and wished to withdraw the medication due to side effects and/or discomfort of the treatment. Refractory glaucoma and eyes with previous filtering surgery, previous laser treatments or micropulse transscleral cyclophotocoagulation will be also included. Exclusion Criteria: * Patients with follow up less than 12 months. * Patients with end-stage glaucoma, uveitic and angle closure glaucoma.