Inclusion Criteria:  Patients diagnosed with POAG; The visual acuity of the affected eye is greater than that of manual operation; Between 18 and 90 years old; No surgery or laser treatment within 90 days; Patients with other types of glaucoma whose intraocular pressure has not been controlled by traditional surgery or medication; The target quadrant has healthy conjunctiva and free movement without scars.  Exclusion Criteria:  Angle-closure glaucoma; Active uveitis; Any corneal disease; Patients with eye infections two weeks before the operation; During pregnancy or lactation; Active neovascular glaucoma; Known or suspected allergy or sensitivity to pig products or glutaraldehyde.