Clinical Research Directory

Inclusion Criteria: * 1\. Patients above 40 years old. 2\. POAG who underwent previous uncomplicated cataract surgery with intraocular lens implantation. 3\. Pseudophakic patients with medically uncontrolled glaucoma in spite of the use of two anti-glaucoma medications or intolerance to medical therapy. 4\. Visual field defects in both the superior and inferior hemi-fields outside the central 5 degrees of fixation. 5\. Mean deviation on perimetry ranges between -6 dB and -12 dB Exclusion Criteria: * 1\. Patients with history of previous glaucoma surgery. 2. Patients who have used topical steroids within the last three months. 3. Patients with significant media opacity, such as corneal opacity, that obstructs fundoscopic examination. 4\. Patients with ocular diseases as uveitis. 5. Patients with severe ocular surface disorders as ocular cicatricial pemphigoid. 6\. Aphakic patients. 7. Ocular interventions apart from YAG posterior capsulotomy.