Presbyopia is a slowly progressing and actually normal aging process of the eyes which is based on a loss of elasticity of the eye lens. In this respect, the prognosis of presbyopia is that there is usually no regression or improvement of already existing symptoms unless they exceed the normal extent of the aging process. In general, however, the lack of ability to accommodate to proximity does not increase infinitely but sooner or later comes to a halt.
Most elderly people live with farsightedness of about +1 to +3 diopters. In a previously healthy person, presbyopia begins to become noticeable at around 45 years of age. For example, the newspaper or book has to be kept further away so that a sharp focus is maintained. From a certain age, practically everyone needs reading glasses or some other correction that helps with close-ups that the eye alone can no longer manage.