Real-world Evidence Study of XEN in Chinese Patients With Refractory Glaucoma

Inclusion Criteria: * Patients with refractory glaucomas, including cases where previous surgical treatment has failed, cases of POAG, and pseudoexfoliative or pigmentary glaucoma with open angles that are unresponsive to maximum tolerated medical therapy Exclusion Criteria: * Angle closure glaucoma where angle has not been surgically opened * Previous glaucoma shunt/valve in the target quadrant * Presence of conjunctival scarring, prior conjunctival surgery or other conjunctival pathologies (eg, pterygium) in the target quadrant * Active inflammation (eg, blepharitis, conjunctivitis, keratitis, uveitis) * Active iris neovascularization or neovascularization of the iris within six months of the surgical date * Anterior chamber intraocular lens * Presence of intraocular silicone oil * Vitreous present in the anterior chamber