The Objective is to Evaluate the Anterior Chamber Angle After BANG Procedure, the Study Will Recruit 12 Patients Who Will Undergo Planned Goniectomy for Uncontrolled POAG, Anterior Segment OCT Scan Will Be Used to Evaluate the Anterior Chamber Postoperatively.

Inclusion Criteria: 1. Patients who are being treated for primary open angle glaucoma using eye drops. 2. Patients with uncontrolled intraocular pressure \>21 mm Hg 3. All recruited patients should have open anterior chamber angles demonstrated on gonioscopy examination. 4. Patients giving consent for operation and follow up Exclusion Criteria: * 1- Pseudophakic patients 2- Advanced glaucoma patients. 3- Patients who are to have trabeculectomy or laser trabeculoplasty. 4- Patients with secondary glaucoma. 5- Patients who are unable to give consent for surgery or follow up. 6- Patients with previous trauma to the eye