Causes of myopia among primary school students across the country, and the current situation of myop

Causes of myopia.

The causes of myopia are complex, and there are many influencing factors, and the main factors are roughly divided into genetic factors, environmental factors and nutritional factors.

1.Genetic factors: According to a large number of survey data, the consensus conclusion is that high myopia is related to heredity, and there is a large difference between moderate myopia and less than moderate myopia.

The genetic type of high myopia is concluded by most survey data to be autosomal recessive. As a result, parents and offspring may not develop myopia at the same time. Heredity is often influenced by the objective environment, that is, the conditions of life, which makes it mutate, which increases the complexity of heredity.

2.Environmental factors: environmental factors are mainly close operation and poor working environment, which is the oldest theory, although there are still some controversies, but from a large number of domestic and foreign relevant research reports, it has been recognized that heredity and environment are the main reasons for the formation of myopia, and pointed out that environmental conditions are the objective factors that determine the formation of myopia.

1) Adjustment theory: The vast majority of myopia appears in adolescence, because the adjustment power of adolescent eyes is particularly strong, and they have a high degree of adaptability to work and study at close range, so they are not easy to get tired when they see close. However, if the ciliary muscle is over-tensed for a long time, the ciliary muscle will be fatigued or even spasm and accommodative myopia will appear, and if it is not eliminated in time, it can become irreversible true myopia.

or by other means affecting the elongation of the eyeball axis.

2) Divergence theory: When using the adjustment of close work, it is also necessary to strengthen the divergence function of both eyes turning inward at the same time, which can lead to the pressure of the eye muscle on the eyeball, which can cause the extension of the eye axis.

3) Environmental adaptation theory: In early childhood, the eyeballs are small, most of them are farsighted, and with the increase of age, the eyeballs increase to the state of emmetropia. Reading too much near up during this developmental process makes the eye myopic in order to adapt to this need for accommodation.

This theory has been opposed by many people, but it is a consensus that it is very malleable during the developmental period and has an important impact on the development of myopia.

Other theories are not introduced, but it is worth mentioning that external factors such as lighting, reading posture, contrast, small and blurred characters, too close proximity, and long reading time can all affect the role of these factors.

3.Nutritional constitution theory: From some data analysis, the deficiency of trace elements such as cadmium, strontium and zinc and the weakness of physical constitution can also affect the occurrence of myopia, but there are different ways through which these factors affect myopia.

In short, it can be seen from the above that myopia can be caused by many factors, both external factors and internal physical factors, rather than a single factor.

Among the 8 12-year-old primary school students in China, about 47 children have a myopic eye, and the incidence of myopia is about 23%, about 55% of middle school students, about 76% of college students, and about 300 million people with myopia in the country, including about 200 million teenagers. The number of myopia cases in China ranks first in the world, and the incidence rate is second only to Japan, accounting for the second place in the world, with about 6% of new myopia every year.

The causes of myopia in adolescents are quite complex, and in general, they are not only congenital genetic causes but also acquired environmental factors. The former accounts for 20% and the latter accounts for 80%, and the heritability rate of the child is 56% if one of the parents is highly myopia, and 100% if both parents are highly myopia.

1. The rush for quick success and quick profit in school education often ignores the rest of children's eyes;

2. The diet of modern children is unbalanced;

3. The popularization of television and computers;

4.Too much work, lack of rest.

5.Lack of attention to eye exercises, lack of vitamins.

6.There are more and more electronic products, radiating people's eyes.

Genetic problems. Most people are naturally not adapted to the way people use their eyes, and the result is vision loss.

I read a lot of books. I see a lot of TV.

Play a lot of games.

Not paying attention to your eyes.

Don't do eye exercises seriously.

Congenital inheritance.

I'm dead to open to the oh alone I watch the heat and the meat bazaar play and speed the vicious disease triangle hungry people Akke Day.

There are too many assignments.

Proud of the night.

The current situation of myopia in elementary school students is as follows:

China is a big country with myopia, the world's largest myopia population, the world's first myopia rate, 2018 Health and Family Planning Commission data, China's near-mill circle vision population reached 600 million, is expected to reach more than 700 million by 2020, 6-year-old children's myopia rate, the average myopia rate of primary school students is 36%, the sixth-grade myopia rate is 60%, the average junior high school myopia rate, and the average myopia rate of high school students is 81%. However, in fact, the myopia rate in developed areas such as coastal areas is higher than this average figure.

In addition to genetics, acquired myopia is basically caused by unhealthy eye environment and eye patterns, such as indoor eye use, small area eye use, screen eye use, high-intensity eye use and other long-term close and rigid eye use patterns. If a person lives in the prairie and herds sheep and rides horses every day, it is impossible to get myopia, even if there is myopia in this environment, the degree will increase relatively slowly, and it can improve the naked eye vision. This is the difference between the rigid eye at close range indoors and the dynamic eye at long distance outdoors.

Myopia prevention and control:

Myopia is not possible after the first day, so only prevention, has myopia to control the collapse of blindness to further deepen, myopia prevention and control method is very simple, is Professor Wang Ningli said at the two sessions, one increase and one decrease, that is, to increase the outdoor activity time of children and adolescents (more than two hours a day), reduce the time of near rigid eyes, and myopia prevention and control is a matter of counting in years, there is no way to control and prevent myopia in a short time.

However, the reality is that children and adolescents have a large number of heavy studies, various tutoring classes, interest classes, and electronic products, which cannot achieve the above-mentioned "one increase and one decrease" prevention and control principle, so they can only pay attention to the way they use their eyes, reduce the time they use their eyes, and do the 20-20-20 rule in the process of using their eyes, with the help of some physical training methods.

1. Genetic factors.

It is well established that there is a certain genetic predisposition to myopia, especially for high myopia, which is also a common cause of myopia. However, in general myopia, this tendency is not so obvious. For those with genetic factors, the age of myopia is earlier, and it is more likely to be above.

However, there are also people with high myopia and no family history. High myopia is an autosomal recessive inheritance, and general myopia is a multifactorial genetic disease.

2. Bad habit factors.

One of the reasons: too close to the eyes.

Reason 2: Spending too much time with your eyes.

Reason 3: Reading in the car or while walking.

Reason 4: The use of mobile phones and computers is uncontrolled.

Reason 5: The lighting is too strong or too weak.

If the parent is nearsighted, there is a genetic.

Sitting posture is incorrect, and the use of eyes is not scientific.

Computer, TV, and mobile phones watch too much, and control them in moderation.

I mainly watched TV.

Watching too much TV, playing on the computer for too long, doing too much homework, sitting in the wrong position.

But the differentiation phase will begin to occur on Easter Island, where the UNDP hotel rooms and anti-static begin to ferment good technology development plans, everyone thinks.

The main causes of myopia in elementary school students are generally:

1. Incorrect posture of reading and writing homework, and insufficient light are one of the important direct causes of myopia.

2. Sleeping too late: You can't get enough sleep.

3. Improper way of eye rest: Many children and parents think that after finishing their homework, they can watch TV, play mobile phones, and play video games to relax, which is to let children rest, which is wrong.

4. Can't look far: Many children's lives are in the classroom, in the house, in the car, and the time for outdoor activities and looking far away is less than 3 hours a day.

5. Obvious partial eating, too much sweets.

6. Procrastination of homework: Many children do homework for 20 minutes, often for an hour.

7. In the stage of pseudomyopia, they do not pay attention to, do not **, and blindly wear glasses.

8. Too much early childhood, too long exposure to computers, television, too close distance.

9. Nutritional deficiencies, or other diseases.

The commonly used methods of myopia in primary school students are:

1. The eyes should not be overworked to maintain sufficient sleep, and it is best to wear glasses and do corrective treatment to prevent further deterioration.

2. Insist on doing eye exercises every day and massaging relevant acupuncture points to relieve eye fatigue.

3. When looking at the computer, often blink actively, because people's eyes will not blink automatically in front of the computer screen, resulting in dry eyes.

4. Take a 10-minute break every time you use the computer or work in close proximity for 1 hour to relieve visual fatigue.

5. Rest more, sleep also has an impact.

Those under the age of age should take medication in time. It is recommended to take two packets of Joyeye Vision Nutrients every day, and insist on taking it for a period of time, the degree of myopia will be reduced, and the vision will be improved.

1. Family history Children with a family history of high myopia.

2. Poor learning environment, such as poor lighting or too dazzling lighting, incorrect posture of holding the pencil, too thin and light pencil tip, inappropriate distance between tables and chairs, etc.

3. Children with a very small age of onset of myopia and a large degree.

4. Inappropriate glasses, such as over-correction or insufficient glasses.

5. Poor general health such as frail, premature infants, malnutrition, and picky eating children.

6. If the annual axial growth is above, myopia will develop rapidly.

7. If children eat saccharin-containing foods for a long time, it will also cause a decrease in eyesight, because excessive sugar intake will cause insufficient absorption of calcium, chromium and other trace elements and vitamin B1, which will lead to the reduction of the elasticity of the eye wall and the elongation of the eye axis, thereby promoting the occurrence of myopia and the deepening of myopia.

1.Family genetic history.

High myopia is hereditary, and if parents have high myopia, then children will also have the possibility of myopia, which is one of the reasons for myopia in many elementary school students.

2. Lack of sleep.

The age of 10-13 is the peak period for the formation of myopia. In children of this age, if they do not get enough sleep, the sympathetic and parasympathetic nervous system functions are out of balance, resulting in a dysfunction of the regulatory function of the ciliary muscle, and myopia will develop. Use your eyes at close range for a long time, and use your eyes for too long.

Prolonged eye fatigue can lead to the occurrence of myopia, and the eye is a tissue system that can easily fatigue.

3. Too much time to look close.

In the city, people's eyes are within 5 meters most of the time, and you can't explain to your child what the horizon is, because you can't see it at all! It is precisely because the vision in the city is not wide, there is a lack of environment that can provide children with a far-reaching view, and there is no need to use farsightedness, so his farsightedness will become weaker and weaker.

4. Playing with mobile phones and computers for a long time.

Many elementary school students today have smartphones; On the road, many students play games while walking, which has a bad impact on their eyesight.

On the one hand, primary school students are myopic because of their dependence on electronic products such as mobile phones since childhood, and they basically do not go out for outdoor activities without sunlight, and some children will have musical instruments such as pianos that are easy to cause myopia in learning, and picky eating will also cause the development of myopia.

There are many causes of myopia, mainly the following: 1. Too much eye use at close range, incorrect posture for reading and writing, and too long time. 2. Excessive use of electronic products such as mobile phones and computers.

3. Genetic factors, parents with high myopia, the probability of myopia in children will increase. 4. Nutritional deficiencies.

Nowadays, students' myopia is multifaceted, such as children have less outdoor sports, longer study time, frequent late stays, lack of sleep, often eat sweet fried food, and the use of electronic products.

1. Incorrect posture of reading and writing homework, and insufficient light are one of the important direct causes of myopia. 2. Going to bed too late and not getting enough sleep. 3. The use of electronic products; 4. Can't look far:

Many children live in classrooms, houses, and cars, spending less than 3 hours a day outdoors and looking into the distance. 5. Obvious partial eating, too much sweets.

In the past, it was thought that myopia was caused by genetics and eye diseases. But recently scientists have discovered that a lack of adequate outdoor activity and light exposure can also lead to myopia. During outdoor activities, proper light can help the retina of the eye release dopamine, which elongates the eye axis and helps the normal development of the eye.

1.too little outdoor activity; 2.Too much pressure to study; 3.Exposure to electronics for too long; 4.Incorrect reading and writing posture; 5.If you eat too many sweets in your diet, you should eat less sweets and eat more yellow vegetables and fruits.

Nowadays, electronic products are developed, televisions, mobile phones, computer games, and even the teachers in class use projections, which are harmful to the eyes, and the eyes are tired for a long time, and they are short-sighted.

The main causes of myopia are writing posture, playing with mobile phones for too long, staying up late, and paying attention to your eyes.

The first is to look close for a long time, see including reading, writing, playing mobile phones, electronic products, etc., a state of tension for a long time, less outdoor activities can not guarantee two hours of relaxation time every day, the second reading and writing posture is poor, incorrect reading and writing posture and pen holding posture will cause the eyes to bear the burden of the line of sight, induce myopia and lead to an increase in myopia, the third glasses are incorrect, parents think that the glasses are brought deeper and deeper, and they can't take them off, so they are unwilling to wear glasses for their children, and the fourth eye axis grows, Poor reading and writing posture and non-standard optometry and glasses will promote the compensatory increase of the eye axis, and the offspring of patients with fifth-genetic high myopia will have a higher chance of developing myopia.