Myopia and presbyopia can't offset each other. Myopia is mainly due to genetic factors or bad eye habits, which makes objects image in front of the retina and cannot be recovered after myopia. It is necessary to wear glasses with appropriate degrees in time to make the corrected vision of the eyes reach normal. Presbyopia is due to the hardening of the lens, the decline of ciliary muscle function, unclear ability to see nearby objects and reduced accommodation with age. Myopia patients can show that they can't see nearby objects clearly when they are old. Wearing reading glasses can't see the distant objects clearly, so it is generally necessary to wear two pairs of glasses to see the near and far, respectively. Myopia patients are more prone to visual fatigue after forming reading glasses.

When people are old, myopia and presbyopia can't really offset, but they can eliminate some visual effects. Myopia is characterized by blurred vision when looking at distant objects and normal myopia. With the growth of presbyopia, the lens gradually hardens, and the adjustment ability of the eye decreases, resulting in blurred near vision and unaffected far vision. When people are old, myopia and presbyopia can coexist. Because there is no need to adjust the lens when looking at near objects, presbyopia has no obvious effect on vision when looking at near objects, so it may not be necessary to wear presbyopia glasses when looking at far objects.

Myopia and presbyopia are two completely different refractive states. Myopia is due to the improvement of the refractive power of the eyes, which will lead to the decline of far vision, that is, the distance is blurred, but the near vision is still normal. Presbyopia is caused by the decline of the accommodation ability of the lens with age, which will lead to the decline of the accommodation function of the eye and the decline of near vision. It is more difficult to read at close range, and I like to put the reading target farther away, which makes me feel clearer and more comfortable. The two can't cancel each other out and may exist at the same time. After this happens, it is recommended to wear two pairs of glasses. The first pair is near glasses, which can improve near vision. One pair is hyperopia glasses, mainly to improve hyperopia vision.