The great majority of glaucoma cases evolve silently, as patients may not notice vision loss until it is significant and present in both eyes, or may assume that vision loss is correctable, as it is for other conditions such as cataract. When the disease is at advanced stages, most patients will then perceive visual abnormalities. Glaucomatous damage to the optic nerve is irreversible, so what is lost cannot be recovered.
The asymptomatic early stages of disease and irreversible nature of the glaucoma makes it one of the main causes of blindness worldwide. Glaucoma does not have a cure, however, this disease can be treated and the worsening of glaucomatous damage can be limited or even stopped. Thus, an early detection associated to an appropriate treatment and follow-up can preserve your vision throughout your lifetime.