Children who are farsighted often need to wear convex lenses to correct their vision; elderly people who are presbyopic need to wear convex lenses to read newspapers. Are farsightedness and presbyopia the same thing? What is the difference between them? We say that farsightedness is a kind of refractive error, and farsighted eyes are not clear at a distance, and even less clear near. Presbyopia is medically known as “presbyopia” and is not a refractive error. It is a natural physiological process that occurs as the human eye ages and gradually loses its ability to adjust. Many children have varying degrees of farsightedness from the time they are born to the time they enter elementary school. With the development of the eye, most of the children can reach the state of orthopia (not farsighted and not nearsighted) when they start elementary school. However, some children with high farsightedness or whose eyes are not very well developed may still have residual farsightedness, which can seriously affect their learning if they are not corrected with glasses. If the farsightedness is as high as 500 degrees or more, even if the child’s eye regulation is strong, it is difficult to maintain the regulation for a long time to see clearly, it will lead to see near and far are not clear. In the critical period of vision development between 0 and 5 years old, uncorrected high hyperopia can cause amblyopia in children. Therefore, farsightedness and presbyopia are two completely different things.