Glaucoma is a complex and chronic eye disease which damages the optic nerve. Beginning at the periphery of the vision field, it often progresses very slowly, which means that the patients consult a doctor only when damages have become very large. Glaucoma requires a lifelong medical treatment. Regardless of the medical treatment, damaged nerve fibers will never regenerate. An early onset of the medical treatment is crucial to avoid the progression of the disease which, if not treated, would also affect the central vision, resulting in patients with severe handicap.