Deep Sclerectomy With Scleral Bed Fenestration Versus Trabeculectomy in Medically Uncontrolled Primary Open Angle Glaucoma Patients

this study tries to find the efficacy of adding certain modifications to deep sclerectomy in primary open angle glaucoma patients who can no be controlled by medical therapy and if it can reach trabeculectomy efficacy or not

Inclusion Criteria: 1. Patients above 40 years old. 2. Primary open angle glaucoma patients who are uncontrolled on maximally tolerated medical therapy. 3. لاPhakic (with clear lens or visually insignificant cataract) patients Exclusion Criteria: 1. Patients with any other type of glaucoma except for primary open angle glaucoma. 2. Patients who received previous laser therapy for glaucoma as laser trabeculoplasty. 3. Patients with severe ocular surface diseases as ocular cicatricial pemphigoid and severe dry eye 4. Previous ocular surgeries. 5. Patients with significant cataract.