1. Patients with primary glaucoma.

2. Age 21 years or over.

3. Uncontrolled glaucoma, with failed medical and laser treatment, requiring trabeculectomy.

4. Visually impairing cataract, requiring cataract extraction surgery.

5. Subject able and willing to cooperate with investigation plan.

6. Subject able and willing to complete postoperative follow-up requirements.

7. Subject willing to sign informed consent form.

OculusGen™ Collagen Matrix Implant for Phaco-Trabeculectomy in Primary Glaucoma: a Case-Control Study