This observational study aims to identify early diagnostic markers of glaucomatous damage by combining functional and structural assessments. Patients with primary open-angle glaucoma and ocular hypertension will undergo comprehensive ophthalmological evaluation, including visual field testing and multimodal imaging of the optic nerve and retina. Both retrospective and prospective data will be collected. The main objective is to define new diagnostic paradigms for detecting early glaucomatous changes and to improve the accuracy of current clinical practice in glaucoma management.