Eye accommodation refers to the process of dynamic changes in the eyeball that are required for the eye to see objects near and far, and the tissues involved include the ciliary muscle, the lens, and the suspensory ligament of the lens. When looking at near objects, the lens needs to become convex so that the object can be imaged on the retina, and the suspensory ligament of the lens is used to pull the lens to achieve the shape it should be in. As patients age, especially past the age of 40, the ciliary muscle’s contraction and diastolic ability decreases, and the accommodation power will gradually decrease, which will develop into presbyopia, which is characterized by unclear and persistent near vision, and easy to have a sense of fatigue. For patients without refractive error before, you can select the glasses degree according to the glasses suitable for people of the same age, such as the general age of 50 years old patients, consider 200 ° presbyopia, refractive error before, you should go to the regular hospital for examination and prescription.