What is the normal vision of an eight-year-old child?

If we find that an eight-year-old child has poor eyesight, it may be caused by congenital eye diseases, or it may be because long-term exposure to electronic devices has affected the eyesight, so we should prevent children from playing games on mobile phones or computers for a long time. The vision of an 8-year-old child is generally above 5.0. A vision below 5.0 proves that the child plays with mobile phones and other electronic devices more often and has poor eye refractive power.

The vision of an 8-year-old child should be normal, that is, above 5.0, or even 5.2 or better.

It is recommended to pay attention to changes in children's vision and refractive power. Children generally have mild hyperopia, which can protect children from myopia. The adjustment function of children's eyes is very good, and mild hyperopia can be compensated by adjustment. Of course, if a child has high hyperopia, there must be a problem and they need to wear glasses for correction and provide visual training. If the child is nearsighted, no vision training will be given.

Additional information:

Protect your eyesight

Generally speaking, when looking at objects at different distances and different brightness, the human eye has a certain ability to adjust so that the image projected on the retina is as clear as possible.

However, excessive use of the eyes will increase the pressure of the extraocular muscles on the eyeball, especially for primary and secondary school students whose eyes are in the development stage and the wall of the eyeball is relatively elastic. Long-term excessive use of the eyes can more easily cause abnormal development of the eyeball, causing distant light to deviate from the retina after refraction by the eye, resulting in vision loss. So, how can we avoid this kind of excessive eye use?

Appropriate light brightness

Poor light brightness (too bright or too dim), especially inappropriate ambient light in study, work and life where eye intensity is high, is the number one factor affecting vision. To this end, the country has established strict standards for light illumination requirements in different indoor occasions (such as illumination for reading/writing in a study > 300Lux), but for ordinary people, this is not so direct in helping to protect eyesight.

The reason is that most people do not have much knowledge about the ambient light illumination (brightness), and the measurement of light illumination requires an eye protection photometer pen or special illumination equipment. Therefore, it is not easy for ordinary people to judge whether the light is appropriate in their daily study, life and work.

Generally, there are three main situations of poor lighting: first, the light in the environment is inappropriate (such as too bright or too dark); second, incorrect body posture (such as sitting or head posture) blocks the light, making the originally appropriate light dim when it reaches the target area; third, the light changes (such as sunlight in the morning and evening, cloudy weather, or natural light during cloudy/rainy weather, changes in the position of the desk lamp or the angle of illumination).

It is important to avoid these situations in normal times to ensure that the light in the target area is bright and soft, so that the eyes are always in a relaxed state. If you are unable to judge whether the light brightness in your study/workplace is appropriate, it is best to do some testing with an eye protection light pen.

Good close eye posture

Close eye posture is another factor that affects the incidence of myopia. Bad habits such as riding in a car, lying in bed, or reading with your head tilted at a desk will increase the frequency and amplitude of eye adjustment and should be avoided as much as possible.

When using your eyes at close range, it is best to stay still, sit upright, and place the book about 30 cm away from your eyes. If you are watching TV, the distance from the TV should be at least 6 times the diagonal of the TV.

Shorten the time of using eyes at close range

In addition to pathological factors, the vision loss of most students is due to the decline of eye accommodation function. Using the eyes at close range for a long time in poor ambient lighting can easily lead to a decrease in the eye's accommodation function, which in turn leads to decreased vision, so it should be avoided as much as possible. Usually, when using your eyes at close range, you should take a 10-15 minute break every 45-60 minutes.

Increase outdoor activities

Taking part in more outdoor activities/sports can not only promote blood circulation in the eyes, but also give the eyes more time to look into the distance and help relax the eye muscles/nerves. Its role in protecting vision is self-evident.

in conclusion

Doing the above points in your life will help protect your eyesight. However, if vision loss (such as myopia) has already occurred, you should get checked as soon as possible, analyze the cause and try to correct it, rather than rushing to get glasses or blindly trying various "quick" treatment devices, otherwise you will miss the chance to restore your vision. Only by finding and eliminating the causes of vision loss can we truly protect our eyesight.