Glaucoma is the leading cause of irreversible blindness worldwide and it is important to assess the impact of timely diagnosis and treatment on this disease due to the complications it can bring to patients. It is an insidious pathology and sometimes it is usually detected spontaneously in ordinary consultations. The most frequent type of glaucoma is primary open-angle glaucoma (POAG), being the second cause of blindness worldwide according to the WHO. Making known and providing information on the subject can reduce cases of blindness in the world and patients could lead a better quality of life by going to the doctor in time knowing how to identify the pathology through its clinical picture in early stages. Glaucoma is the leading cause of irreversible blindness worldwide. It is an insidious pathology that is usually detected spontaneously. The most common type is the open angle primary (OPAG). It is important to know and provide information in order to detect and prevent cases of blindness in the world.