1.Can myopia and presbyopia cancel each other out? Some people say that myopia does not cause presbyopia, and that myopia and presbyopia will cancel each other out! This can make many nearsighted people happy. When we are old, we will not have presbyopia, and then it will be your turn to wear presbyopic glasses for those who are not nearsighted. The truth is that both myopic, farsighted, and astigmatic people will have presbyopia. It’s just that people who are nearsighted can relatively reduce the number of convex lenses in their presbyopes or simply remove the glasses they wear for nearsightedness. The farsighted or orthoptically sighted people will have problems looking closer earlier, and many of them may have to wear presbyopic or bifocals after the age of 40. 2, wear glasses for too long will really make the eyes deformed? Anecdotal evidence: do not wear glasses for a long time, this will make glasses deformation. The glasses family can really be hurt ah. The truth is that wearing glasses is because of myopia or farsightedness and other refractive errors. Myopia or farsightedness and other refractive disorders can lead to eye deformation, if the same patient does not wear glasses, then his eyes are also deformed. 3. Are presbyopia and hyperopia “twins”? Presbyopia and hyperopia are not the same concept, nor are they “twins”. Don’t confuse presbyopia with hyperopia! The truth is that presbyopia is one type of refractive error. Everyone who reaches a certain age (generally over 40) will suffer from presbyopia in a more or less severe way. Farsightedness is due to the short axis of the eye, parallel light rays into the eye, after refraction gathering point on the retina, so that the external image can not be clearly imaged on the retina, then the eye is often adjusted to strengthen the refractive power, so that the parallel incoming light gathered on the retina, forming a clear image.