What causes myopia and what causes it

What causes myopia? The causes of myopia are not completely clear, and most scholars believe that the formation of myopia is related to a variety of factors, including genetic factors, environmental factors, poor eye habits, and so on

1. Genetic factors, myopia, especially high myopia, has a certain genetic tendency, and you can see the manifestations of family aggregation, such as both parents, one party is myopia, high myopia, and the possibility of children developing myopia will increase.

2. Environmental factors, such as long-term close-up eyes, the incidence of myopia is relatively high, which is also the main reason for the high incidence of myopia among adolescents in our country.

3. In addition, there are many inducing factors, some studies have shown that such as the lack of trace elements, the imbalance of certain nutrients, and even air pollution, may become the predisposing factors of myopia, it should be pointed out that the popularity of electronic products, long-term close viewing of electronic screens, will also promote the occurrence and development of myopia.

Reason 1: Thinning of the eyeball skin (looking at blue light electronic products for a long time, the more free radicals will be generated, and the closer you are to the eye, the more acidic waste will be generated.) These two substances cause the gradual loss of the extracellular interstitium of the sclera, which eventually leads to the thinning of the sclera. ）

Reason 2: "Blowing too much" (using the eyes too hard and too close will lead to excessive intraocular pressure, excessive aqueous humor secretion, and too much blowing.) ）

Reason 3: Too little deflation (not letting the eyes rest for a long time, the brightness of the lighting environment is not enough, the pupils become larger, and the angle becomes smaller, the more difficult it is for the eyes to deflate).

Reason 4: Lack of trace elements (Studies have shown that the occurrence of myopia, in addition to congenital genetics, acquired environmental factors, etc., is also related to the lack of trace elements in the body, especially the lack of trace elements such as calcium, zinc, and vitamin A. ）

It should be noted that once it is determined that it is myopia, then it is necessary to correct it in time, wear glasses when you should wear glasses, and then cooperate with the correction of bad eye habits, go outdoors, pay attention to the rest of the eyes, and supplement the comprehensive nutrition of the eyes with Leyan vision nutrients, so that you can gradually correct myopia.

If myopia develops, several causes are often considered:

2. Improper use of eyes: juvenile myopia is mainly caused by long-term close eye use, and long-term too close to see things will lead to excessive eye adjustment, resulting in ciliary muscle spasm and pseudomyopia, and if it is not corrected, it will further form true myopia. At the same time, the critical period of myopia prevention is in the adolescent period of 6-12 years old, some adolescents have combined true myopia, because they do not go to the hospital for regular optometry or parents are unwilling to let their children wear appropriate prescription glasses, which can also lead to the rapid development of myopia.

Myopia should still be paid attention to and corrected in time.

1. Scientific control of myopia: once myopia occurs, you need to go to the hospital for optometry, wear glasses with appropriate power to correct myopia, and beware of the rapid growth of myopia. This point is especially important for teenagers, who need to go to the hospital every six months for dilated eye refraction and wear glasses with appropriate power according to the change of myopia, so as to form a clear image and slow down the rapid growth of myopia.

2. Increase the time of outdoor activities: It is recommended that the time for outdoor activities in the sun be no less than two hours every day, and it is recommended that teenagers with myopia should do outdoor activities for a longer time. Studies have found that natural light can promote the release of dopamine from the retina and delay the progression of myopia.

5. Pay attention to the supplement of eye nutrition: balanced nutrition, no picky eating, no overeating, less sugar, more vegetables and fruits, and drinking no less than 1500 ml of water every day. In addition, it is necessary to supplement the vision nutrients of Leyan in time, and supplement the lutein, anthocyanins and zeaxanthin that the eyes have been consuming, so as to better control or improve the degree of myopia.

If you insist on correcting it in this way, then the myopia of the eyes will naturally improve gradually.

The main cause of myopia is the inappropriate use of the eyes, and the so-called inappropriate use of the eyes is often the use of the eyes that are particularly prone to excessive fatigue for a long time. There are muscles around the eyes controlled, when the eyes are tired for a long time, the muscles around the eyes are too tired, it is in a state of high tension, it can not relax, resulting in the convergence of external parallel rays entering the eyes, the convergence point can not accurately fall on the retina, but falls in front of the retina, forming the so-called myopia. Of course, the occurrence of myopia has some physiological structure basis, for example, like this patient, his eye axis has grown, or the patient's corneal curvature is relatively steep, which is a change in physiological structure, but there are also some myopic patients who are congenital.

Therefore, there are many reasons for myopia, and it is necessary to correct myopia for each different cause, and patients with axial myopia can definitely use some orthokeratology lenses to control its progression, but phototaxis myopia can only be corrected by wearing glasses or refractive surgery in adulthood.

Expert tips: The main causes of myopia are as follows: 1. Improper use of eyes, excessive use of eyes for a long time will lead to muscle fatigue around the eyes, and parallel rays from the outside world will enter the eyes, and the convergence point will fall in front of the retina, and then form myopia.

Second, the basis of physiological structure, the patient's eye axis growth, corneal curvature steep, etc., will also form myopia. 3. Myopia caused by congenital causes.

The cause of myopia is actually a very complex process, which has not been thoroughly studied in medicine, but it is currently believed to be more related to the environment and genetics. From a medical point of view, it is mainly related to three factors: form deprivation, accommodative hysteresis, and peripheral defocus. The details are as follows:

1. Deprivation of form sense, such as children with ptosis, ptosis, and congenital cataracts; Some women like to have long bangs, which can also cause form deprivation and myopia;

2. Regulatory dysfunction, regulatory dysfunction In the past, the view was that the regulatory function was advanced, that is, too much adjustment would lead to myopia, but in recent years, a large number of clinical data have shown that if the regulatory function is lagging behind, it is the cause of myopia;

3. Peripheral defocus theory, that is, ** imaging is on the retina, but the peripheral image imaging is behind the retina, which leads to the growth of the eye axis, which leads to the occurrence of myopia.

1. Pay attention to the time you spend with your eyes.

Children's eye development is not perfect, the ability to work is low, every time you read or write for an hour, you should let the child go to outdoor activities, do games, look into the distance, or observe the flowers and trees, so that the tense eye muscles are relaxed, eliminate fatigue. In addition, it is necessary to make the child's life regular, have enough sleep, and let the eyes get enough rest.

2. Pay attention to the light of your eyes.

Do not allow your child to read or write in dark light or sunlight. If a 25-watt light bulb is used indoors at night, the distance between the book and the bulb should be within 1 meter. If you use a 60-watt bulb on a stool, the distance between the book and the bulb should be 1 2 meters.

Cloudy days, dusk, weak light in the moonlight, and strong light in the sun are not suitable for reading and writing. When watching TV, it is necessary to maintain a suitable distance, which should generally be 5 7 times the diagonal length of the phosphor screen. The time to watch TV should not exceed 2 hours at a time.

3. Pay attention to eye exercise.

Physical exercise can enhance blood circulation and metabolism, supply more nutrients to the eyes, and enhance the resistance of the eyes, which is an indirect exercise for the eyes. The direct exercise is eye exercises, which is based on the massage, massage, acupuncture and acupuncture acupuncture points of Chinese medicine, combined with jujube Kuanhui medical sports, which is a scientific method to protect eyesight. Parents should learn the basic knowledge of eye exercises, give specific guidance and often urge their children to do eye exercises, and persevere.

4. Pay attention to eye nutrition.

In order to protect children's eyes, children can eat more carrots, animal liver, lean meat, to supplement vitamin A, or regularly supplement the comprehensive nutrition of the eyes with Leyan vision nutrients, and at the same time, it is also necessary to appropriately consume millet, tofu, animal liver and other supplements of vitamin B2, so as to avoid night blindness, corneal malacia, red eyes, dry itching and other symptoms. Eating too much sugar will harm your child's eyesight, so your child's sugar intake should be controlled.

5. Pay attention to regular inspections.

Regular check-ups are due to the fact that children's eye structure, binocular visual function, and intelligence are still in the process of continuous development after birth, and the content of the examination is different at different ages. The usual age of ophthalmologic examination is generally 2-7 days after birth, 42 days after birth, 3 months, 6 months, and 1 year of age, and then once a year. In this way, the problem can be detected early and corrected early, instead of waiting until the vision has deteriorated and there is a vision problem before going for a check-up.

Part of it is due to genetic factors, and part of it is due to unhealthy eye use in the later stage.

Turn off the lights and play with your phone genetic school seat reasons.

Caused by watching electronic products and TV, or writing homework with improper posture, and prolonged close proximity. Of course, the main reason is overuse of the eyes.

There are two causes of myopia: congenital and acquired. Congenital myopia is mainly a high degree of myopia of more than 600 degrees, which is mostly related to genetic factors. Experts from the Eye Hospital of the China Academy of Traditional Chinese Medicine found that 67% of the 100 children with a family history of genetic myopia developed before the age of 10.

Experts have observed from the statistics of thousands of medical records diagnosed and treated: children who develop myopia and astigmatism at the age of 5-10 years old often have myopia, amblyopia, astigmatism and other eye diseases in one or both of their parents. Acquired myopia is generally below 600 degrees and is mainly related to environmental factors.

The results show that myopia is the adaptation of the human eye to the contemporary environment, and its occurrence and development are closely related to the environment of increasing near-eye activities, and the imbalance of nutrient intake. Incorrect use of eyes and lack of attention to eye hygiene (such as watching TV and surfing the Internet for too long) are the main reasons for the increase in myopia in modern children.

Most of them are long-term eye fatigue, which is inseparable from TV, computer, **, mobile phone, and may also be congenital.

Axial growth.

The refractive index of the diopter medium becomes larger.

corneal curvature and more.

Caused by incorrect use of the eyes, long-term excessive fatigue of the eyes.

Pathologic analysis, ciliary muscle accommodation is too active (overuse of the eye).

Adopt the wrong way to use your eyes.

Ophthalmologist Shi Yongli Profile: Director of the Department of Ophthalmology, working in a tertiary hospital for more than 10 years, good at cataract, glaucoma, pterygium surgery and various ocular surface diseases, dry eye syndrome, keratitis and pigmentitis, fundus disease, various complex eye diseases, systemic diseases, ocular complications and difficult diseases.

Causes of myopia. In the past, there was no consensus of opinion. But it boils down to two kinds of factors: internal and external.

The brief introduction is as follows:1.Internal causes

Genetic predisposition:There is a certain genetic predisposition to myopia. It has been recognized.

This is especially true for high myopia. But for general myopia. This tendency is not so obvious.

Those with genetic factors. The age of onset is early. More than above.

However, there are also people with high myopia. No family history. High myopia is autosomal recessive.

In general, myopia is a multifactorial genetic disease.

Developmental Factors:Babies have smaller eyeballs. Therefore, they are all farsighted.

But with age. The eye axis is also gradually lengthened. Normal development does not occur until puberty.

Such as hyperplasia. short-sightedness is formed. This type of myopia is called isolated myopia.

It mostly starts at school age. Generally below. It stops developing around the age of 20.

For example, it progresses rapidly in childhood. Progression is more rapid by the age of 15 to 20 years. After that, it slows down.

This type of myopia is often higher than. Up to 20d, 25d or 30d. This type of myopia is called high myopia or progressive myopia or pathological myopia.

This type of myopia can develop and degenerate later in life. As a result, vision may gradually deteriorate. Glasses do not correct vision.

It is rare to have myopia at birth. However, a very small number are congenital.

2.External factors are environmental factors.

People who work in clerical work or other close work. There are more myopic eyes. There is also a high incidence of myopia among adolescent students.

And from the fifth of primary school. Sixth grade starts. There has been a marked increase in prevalence.

This phenomenon. It shows that the occurrence and development of myopia is very closely related to near work. Especially the eyeballs of teenagers.

It is in the stage of growth and development. Very adjustable. The ball wall is also more stretchable.

Read. Adjustment and collection effect when working in close proximity such as the mailroom. Causes the lateral Ken muscle (mainly the medial rectus muscle) to exert some pressure on the eyeball.

Intraocular pressure is also correspondingly elevated. As the number of jobs continues to increase. The frequency and timing of adjustments and assemblies also gradually increased.

The ciliary and extraocular muscles are often in a state of high tension. Overexertion of the regulatory effect can cause ciliary muscle spasm. This causes temporary vision loss.