Impact Post-operative Treatment on Intraocular Pressure Post-SLT on Patients With Primary Open-angle Glaucoma

Inclusion Criteria: * Patients suffering from with primary open-angle glaucoma. * Patients with IOP \> 21 mmHg, uncontrolled with medical treatment or due to non-compliance, or to whom this is the first glaucoma treatment. * Patients \> 18 years old, able to consent. * Patients consenting to the trial. Exclusion Criteria: * Patients suffering from chronic glaucoma other than primary open-angle glaucoma * Patients who had changes done to their anti-glaucoma treatments over the last 6 weeks or following the SLT * Patients under oral corticosteroid treatment at the time of the operation or those who have stopped during the preceding month. * Patients suffering from an important corneal disease which interferes with the capacity to visualize the entire trabeculae. * Monophthalmic patients. * Patients who already underwent a glaucoma treatment to the eye requiring treatment. * Patients who already underwent a glaucoma treatment using SLT or ALT (Argon laser trabeculoplasty) * Patients who underwent cataract surgery in the past 3 months. * Pregnant patients.