Presbyopia, which may refer to presbyopia, also called old vision, is a normal physiological state. at age 45, the eyes may become presbyopic. With age, the lens gradually hardens and becomes less elastic, and the function of the ciliary muscle may gradually decrease, causing a decrease in the eye’s ability to regulate, and a series of symptoms may occur, which is presbyopia. In the early stages of presbyopia, you need to place the target a little farther away in order to see clearly, and if there is not enough light, close reading may be more difficult. At the age of 45 with presbyopia, it is recommended to go to a hospital eye clinic for examination, such as slit lamp microscopy, which can determine whether there is clouding of the lens, and need to rule out the presence of cataract disease first. If there is no other disease, with the gradual increase of age, the eyes gradually appear presbyopia symptoms, is a normal performance.