Why are people nearsighted? Can they return to normal if they get myopia?

Upper part: Seen from the cross, the ridge side becomes a peak.

Bottom line: Who can't tell from a distance?

Horizontal criticism: myopia

It is said that the eyes are the windows to the soul. If this window is covered by something, then we can't see clearly what is in front of us, such as myopia.

Why are people nearsighted?

Compare a person's eyeball to a camera, which has a lens cover, a lens and a backboard. The lens cover, lens and master all have their own positions, which should be matched with each other, or the refractive index should be matched. Myopia is because the refractive power of the lens is too strong to image on the retina.

As we all know, myopia will bring a lot of inconvenience to life; At present, there are more people who are nearsighted after 80, 90 or even 00. There are many reasons for myopia, some are congenital, such as parents' myopia, and some are acquired, such as bad habits.

High myopia is highly hereditary.

We often hear the saying of hereditary myopia. Many people think that it is their improper use of eyes that leads to myopia, so children also inherit myopia. Actually, it's not. If it is common myopia, our eyes are unsanitary, and myopia caused by excessive eye intensity is generally not hereditary, which may have a certain genetic relationship with high myopia.

The so-called high myopia means that the degree is more than 600 degrees and the axial length is more than 26 mm. If both parents are high myopia, the probability of passing it on to their children may be 100%. If only one parent is high myopia, the probability of passing it on to their children may be 50%. If both parents are high myopia gene carriers, the probability of passing it on to their children may be 25%.

Even if both sides are highly myopic, there is no need to be overly nervous. If conditions permit, we can interfere with gene inheritance through external factors.

Can myopia return to normal?

Myopia can be divided into pseudomyopia and true myopia.

For pseudomyopia, it is not because of the growth of the axial length, but because the lens adjustment of the eye is too strong, which causes some accommodation spasms in our eyes. Pseudomyopia can generally be improved by rest, reducing the frequency of eye use (more rest, eyes are not tired) and some eye care and treatment. Some people will get better gradually, but it also varies from person to person.

On the basis of pseudomyopia, if you don't pay attention to eye hygiene, often stay up late, the influence of external environment and your own bad habits, I am afraid it will develop into true myopia. Once it is diagnosed as true myopia, you need to wear glasses correctly or need laser surgery to correct it.

Therefore, once myopia is irreversible, it is constantly improving.

How can people without myopia prevent myopia?

How does myopic person slow down vision decline?

Although myopia is irreversible, we can learn some ways and means that are helpful to our eyesight and take preventive measures before myopia. If we get myopia, we can also delay the deepening of myopia.

1. Develop good living habits and pay attention to diet.

Lack of sleep/staying up late/excessive use of eyes can easily lead to eye fatigue and decreased vision. Therefore, after watching TV/working/playing mobile phone for a period of time, you should have a moderate rest, do eye massage (eye exercises) and walk around. Also, when we sleep at night, try not to turn on the light to sleep. The intensity of light at night also has a certain influence on our eyesight. Eat more foods that are good for your eyes, such as foods containing vitamin A and B 1.

2. Increase outdoor activities and exercise properly.

A survey shows that if outdoor activities are increased by 1-3 hours, the risk of myopia will be reduced by 2%. Relatively speaking, the outdoor light is brighter and the field of vision is clearer, which helps to consolidate the sclera of the eye, stimulate the retina to secrete dopamine, and play a role in preventing myopia.

3. Parents with high myopia should take precautions in advance.

If both parents are highly myopic, you can minimize the genetic impact on your baby through various methods. For example, let pregnant mothers get rubella vaccine in advance, because rubella virus infection in early pregnancy will directly affect the development of baby's eyes and may lead to congenital cataract. Pay more attention to whether the baby's vision is abnormal after delivery, take the baby for eye examination regularly, find problems in time, and make diagnosis and treatment in time.

Therefore, no matter whether we are nearsighted or not, we should take good care of our eyes, use them correctly, don't stay up late, and supplement vitamins appropriately so that our eyes can get timely rest and relief when they are tired. Let's join like eyes and like eyes!