Abstract: myopia is actually a concept of vision, which refers to the range of vision. It can see clearly the things near and the things far away. Myopia is divided into two kinds, one is refractive myopia, the other is axial myopia. Axial myopia is true myopia.
the latest research report of the World Health Organization shows that at present, the number of myopia patients in China is up to 600 million. The myopia rate of high school students and college students has exceeded 70%, and the myopia rate of primary school students is close to 40%. The myopia rate of teenagers in China ranks first in the world, and this data is still rising year by year.
myopia is actually a concept of vision, which refers to the range of vision, seeing clearly near things and not far things. Myopia is divided into two kinds, one is refractive myopia, the other is axial myopia. Axial myopia is true myopia. Generally speaking, it is a state in which the eyes can see clearly near but not far, that is, they can only see near but not far. Children and teenagers are studying in school. They spend a long time reading, writing and other near work. When looking at near objects, the eyes should use the adjustment function, that is, the ciliary muscle in the eyes should contract. Long-term near work or improper overuse of the eyes, such as reading novels, playing video games and watching TV, can make the ciliary muscle contract continuously and be in a state of spasm, If there is no pathological change in the fundus, it is called pseudomyopia, also known as regulatory myopia; If pathological changes occur in the fundus, it is called true myopia.
so how do we distinguish true and false myopia? Both true and false myopia of
showed decreased far vision and good near vision. Pseudomyopia is functional, mostly in adolescents. Vision can decline in a few weeks or 1 ~ 2 months, and can recover to some extent after appropriate rest. True myopia is an organic change and cannot recover naturally.
find a 300 degree reading glass, look at the distant object for 3 minutes, then remove the right lens, and immediately check the naked eye vision. Those with improved vision are false, and those without improved vision are true; Then check the left eye with the same method. With this method, more than 90% of
can be tested. Then the problem comes. How can
prevent pseudomyopia from becoming true myopia?
generally refer to the myopia of teenagers. At the beginning, most of them belong to “pseudomyopia”. It is a kind of functional myopia caused by excessive eye use and tension adjustment. So how to prevent pseudomyopia from becoming true myopia? Parents should help their children do the following:
1) good eye habits. Don’t read askew or obliquely; Don’t read in bad light; Don’t read for a long time.
2) often do outdoor activities. Outdoor activities can reduce children’s time to use electronic products, and also give children the opportunity to overlook. Their eyes can be relaxed as much as possible, which can effectively help children recover their eyesight.
3) usually eat more foods rich in vitamins and trace elements, such as animal liver, egg yolk, corn, etc., which can prevent myopia.