Posterior Cornea in Primary Open Angle Glaucoma

Inclusion Criteria: * Primary open angle glaucoma, with the diagnosis supported on structural and functional complementary exams according to the current European Glaucoma Society guidelines * Healthy subjects from the General Ophthalmology Outpatient Clinic Exclusion Criteria: * age inferior to 18 years old * primary closed angle glaucoma * secondary open angle glaucoma * previous intra-ocular surgery * known or suspected corneal disease * previous intra-ocular inflammation * previous ocular trauma