Abstract: many people believe that myopia will not presbyopia when it is old. In fact, this view is not correct. Presbyopia will also occur when myopia is more than 300 degrees, and presbyopia may not occur when myopia is less than 300 degrees., I often hear people ask, “Alas, I am old. I have presbyopia. Why can’t I offset my myopia?” Or, some people ask in turn, “I’m old. Why can’t my myopia offset my presbyopia?”, from the definition of myopia and presbyopia. Myopia: see near clearly, see far not clearly, presbyopia: see near not clearly, see far and tableland to come the same. The elderly without myopia need not wear glasses to see far, but need to see near). Therefore, what myopia and presbyopia can offset is only the part of “seeing near”. Those who see far are still “myopia”.
Often hear people ask: “Alas, I am old. I have presbyopia. Why can’t I offset my myopia?” Or, some people ask in turn, “I’m old. Why can’t my myopia offset my presbyopia?”
From the definition of myopia and presbyopia. Myopia: see near clearly, see far not clearly, presbyopia: see near not clearly, see far and tableland to come the same. The elderly without myopia need not wear glasses to see far, but need to see near). Therefore, what myopia and presbyopia can offset is only the part of “seeing near”. Those who see far are still “myopia”. Moreover, presbyopia is only 300 degrees at most; It can only offset the 300 degrees that people with myopia can see close. If a person with six Baidu myopia is offset by presbyopia to see nearly 250 degrees, he still needs 350 degrees of myopia glasses.
So, in fact, people should wear glasses all their life. People who are not short-sighted need not wear glasses when they see far all their life. Those who see near should wear presbyopia glasses when they are old; Myopia is less than 300 degrees. You don’t need to wear myopia glasses for nearly a lifetime, but you should wear myopia glasses for a lifetime. Many people with myopia of more than 300 degrees should wear it when looking from far to near.
Therefore, there are some situations in your life that you need to wear glasses. This is also the current policy to prevent myopia: even if there is no way to make everyone have no myopia, at least control it within 300 degrees. In this way, when you are old, you don’t have to wear presbyopia glasses when you look close. Of course, we still hope that it is best for our citizens to control at no degree.