A questionnaire report on the visual condition of middle school students

Write about your current vision and your original vision, this is to see if you have vision loss, and then write about your parents' vision, where you usually read, and the posture in which you read.

There should be no fixed number of people, you try to fill in all your friends, and that's it

Nowadays, there are more and more people with myopia, and the age of respect is getting younger and younger, so to protect eyesight and prevent myopia, we must start from the baby.

Commonly used methods to protect eyesight are:

1. The time of close eye use should not be too long, every 40-50 minutes, you should take a little rest for 3-5 minutes, and look into the distance to relieve visual fatigue.

2. Read and write, play with the computer, maintain the correct posture, the height of the table and chair should be appropriate, and the distance between the eyes and the reading material should be about 33 cm.

3. Mix whole grains, meat and vegetables, eat more vegetables and fruits, and don't eat partially. Lack of vitamins in food is prone to night blindness and dry eye disease, and lack of trace elements chromium and calcium in food makes it easy to suffer from myopia. In addition, it is also necessary to pay attention to regular supplementation of eye vision nutrients, not from the nutrients required by the eyes, enhance the anti-fatigue ability of the eyes, and better protect the eyesight.

Fourth, when reading and writing, the light should be moderate, not too strong or too dark, and the light should come from the left front, so as not to obstruct the vision of the hand shadow. The light should be soft, if it is incandescent, it should be between 25 and 40W, and it is not recommended to read in the sun. Because the intensity of light has a direct impact on pupil dilation, too strong light will increase the intensity of eye accommodation, aggravate the intensity of eye labor, and it is easy to cause myopia after a long time.

Generally, desktop lamps should be less than 40 watts.

5. Avoid reading while walking or reading in a walking car. Because the carriage is shaking, the body is shaking, and the distance between the eyes and the book cannot be fixed, the burden on the glasses will increase. Often, this is likely to lead to myopia.

6. Actively participate in physical exercise to enhance physical fitness. As the eye follows the target, the ciliary muscles continue to relax and contract, and the synergistic effect of the extraocular muscles can increase the blood perfusion of the eye, promote the metabolism of the eye, and thus reduce eye fatigue. Moreover, the quality of physical fitness is also closely related to the occurrence of myopia in children.

Malnourished and weak children are prone to myopia.

7. Insist on doing proper eye exercises. By massaging the acupuncture points around the eyes to enhance the blood circulation of the eye socket, improve neuronutrition, eliminate the excessive congestion in the eye, and achieve the purpose of relieving eye fatigue, it is conducive to the prevention and treatment of pseudomyopia in adolescents, and is a good way for adolescents to self-care their eyes.

8. Eat less candy and high-sugar foods. Too much sugar will produce a large amount of acidic substances in the blood, and the acid will combine with the salt in the body, especially calcium, resulting in a decrease in blood calcium, which will affect the toughness of the eye wall, make the eye axis easy to elongate, and promote the occurrence and development of myopia.

The content of the research on the visual acuity of middle school students is to understand the causes of myopia in the class, the methods of correction and the preventive measures of myopia, and to enhance the awareness of the students in the class to protect their eyes, so as to prevent and reduce the occurrence of myopia.

Through the survey, it was shown that the number of students in the class suffering from myopia accounted for about the total number of students in the class. Among them, 80% of the students have suffered from myopia since they entered junior high school, and 20% have suffered from myopia since elementary school.

Through further investigation, we found that most of the students suffered from myopia because their eyes were too close to the books when they were writing and reading. The second is to watch TV and surf the Internet for a long time, which causes excessive eye fatigue; Some students are myopic because they read in dim conditions, walk, and read in bright light; There are also some students who have the habit of reading books before they fall asleep at night, so they lie down to sleep in order to be comfortable, and over time, they also suffer from myopia.

In addition, we also found that the prevalence of myopia in urban students was significantly higher than that in rural areas, and as we aged, this phenomenon became more pronounced. According to the survey, this is because rural life is closer to nature and the air is fresher. In addition, rural students watch TV and use computers significantly less frequently than urban students.

In addition, poor reading posture will cause vision loss, and the prevalence of myopia in students who read for a long time is significantly higher than that of students with short reading time, and the closer the reading distance is to the book, the faster the myopia progresses.

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.

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.

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. But why can myopia occur under the influence of close reading or close work?

There is no consensus on this, and there are several main theories:

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.

External factors such as lighting light, reading posture, contrast, blurred words, too close proximity, and long reading times can all affect a child's vision.

3.Nutritional constitution theory: From some data analysis, the deficiency of trace elements such as cadmium, strontium and zinc and other visual nutrients and the weakness of physical constitution can also affect the occurrence of 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.

The problem of myopia has begun to move towards a younger age, and many children have been myopic since childhood. This not only brings very serious safety hazards to children, but also makes parents worry about myopia, for children under 18 years old, because of the strong ocular adjustment at this time, it can be improved by drugs. It is recommended to use Leyan nutrients to treat I, take it with warm water twice a day, and you can slowly reduce the degree of myopia by insisting on using it.

In the past few years, the level of myopia in adolescents in my city has been increasing every year, and the myopia population is spreading in the direction of returning to a young age.

For example, in 2002, the myopia rate of third-grade students was only the same, but in 2004, half of the third-grade students suffered from some degree of myopia this year.

More and more children have formed an "indissoluble bond" with glasses at an early age.

In just a few years, the myopia rate of primary school students in our city has reached as much as 34%.

The same is true in the third year of high school, where only one student suffered from myopia in 2002, and as a result, nearly 90 percent of them have glasses in the past few years.

You can make an appointment in advance, and Wu-Han-Ai-Ge sample to avoid waiting time.

Let him O'O'o' no roll.

Now that there are more and more myopia in teenagers, myopia protection is very important, Xu Xiansu asked, focusing on solving the myopia protection problem of teenagers.