Effect of Kron (Citicoline and Nicotinamide Oral Solution) on Patients With Open-angle Glaucoma

Prospective, masked, randomized placebo-controlled study to evalute the offect of the oral solution Kron® (citicoline 40mg/ml and nicotinamide 15mg/ml) on patients with a diagnosis of open angle glaucoma and risk of glaucoma progression. Glaucomatous patients with a diagnosis of open angle glaucoma and risk of glaucoma progression who meet the study criteria will be enrolled and randomly assign to the following two arms: 1. Treatment group (TG): 20 patients will receive Citicoline 40 mg/ml + Nicotinamide 15 mg/ml oral solution for 3 months (10 ml/day) 2. Control group (CG): 10 patients will be evaluated as control Once recruited, a clinical evaluator will perform a comprehensive ophthalmologic evaluation at baseline, week 6 and week 12. The following examinations will be done in the following sequence: * Visual acuity * Slit lamp evaluation * PERG * PEV pattern * Tonometry * Visual field * Optical Coherence Tomography * Dilated Fundus examination