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What is the cause of myopia

Now myopia seems to have become a common phenomenon. Too many people, especially students, are nearsighted. In the face of more and more people's nearsightedness, what is the cause of myopia? If we want to curb the development of this phenomenon, the most important thing is to find the cause.

The expert makes the following explanation to myopia: myopia is a kind of ametropia. The origin of myopia is still not very clear. It is generally accepted that myopia is caused by many factors. In recent years, many evidences show that environment and genetic factors are involved in myopia. But environmental factors are more likely to cause myopia.

1. Too little time for outdoor activities

Now the living space is too narrow, most of the time children are indoor activities, a lot of close-up use of eyes, and the children's eye adaptability is very strong, it will adjust itself to adapt to this close-up. Moreover, more time in the house, more opportunities to watch TV and play computer. If you don't pay attention to distance and posture, it's easy to make your eyes over tired. In the open air, no matter how close the object is, it is far away from the house. Studies have shown that children who often exercise outdoors suffer from nearsightedness less than children who don't go out often.

2. Improper lighting

'is the light bright enough? I'm afraid that too dark the light will affect the children's vision. 'we generally think so. In fact, ophthalmologists believe that the light for children to read and write is not too dark, but too bright! Too strong light will make children's eyes easily tired. What the child needs is soft light, and make sure that the light comes from the front left of the child. Therefore, in the evening, when children read and write, they can choose a light that can adjust the brightness, and adjust the brightness to soft.

3. Mainly indoor games

What did we play before? Playing top, throwing sandbags, playing hide and seek, rolling iron rings & hellip; & hellip; in short, most of them are outdoor collective activities. In outdoor activities, the eyes will automatically adjust to see things at different distances, and use the eyes alternately from far to near, so that the ciliary muscles of the eyes can be adjusted, without fatigue. Now, for reasons of safety and convenience, parents mostly let their children play at home. Even if the children are invited to play together, they will either go to their home or stay at your home, or play indoor games. In this way, children are using their eyes at close range. The burden of eyes is very heavy.

4. Too much when looking close

In the city, people's sight is within 5 meters most of the time. You can't explain what the horizon is to your children because you can't see it at all. It is precisely because the vision in the city is not broad, and the lack of environment that can provide children with extreme vision is easy to myopia, and his vision function will become weaker and weaker. D. Environmental factors

5. Genetic factors

According to a large number of survey data, high myopia comes from heredity, but there are big differences in the middle and lower myopia. For the genetic type of high myopia, most of the survey data concluded that autosomal recessive inheritance. Therefore, the parents and the children may not have myopia at the same time. Heredity is often affected by the objective environment, that is, living conditions, which makes it mutate, increasing the complexity of heredity.

Early detection of myopia can effectively recover and protect the eyes. We start from the details around us.