What are the causes of myopia? 5

At present, it is believed that the causes of myopia are.

1> Genetic factors, especially in patients with high myopia.

2. > developmental factors, the curvature of the lens in the eyeball gradually increases with age, and if it is overdeveloped, the eye axis gradually lengthens, resulting in myopia.

3> environmental factors, which are the main cause of many myopia patients today.

The myopia rate among adolescent students is gradually increasing, which is inseparable from the increasingly developed scientific and technological products in today's society. The myopia of today's teenagers is mainly caused by watching TV for a long time, surfing the Internet, playing video games, etc., and of course, there are also incorrect postures for reading and writing, books are placed very close to the eyes, or the lighting conditions are not good. These will make the muscles in the ciliary body continue to contract, the lens F degree increases, so that the muscles in the ciliary body are in a state of tension, and the lens that changes F cannot be conceived back to the normal state, which causes pseudomyopia.

If you still do not pay attention to the prevention and treatment measures of Hu Xiao at this time, it will become true myopia.

4. Other factors> such as changes in nutrient content.

Watching too much TV and using too much computer.

If it is pseudomyopia, it can be recovered, and it may be that the liver is not good, so we should pay attention to nourishing the liver. Eat more green foods.

The exact mechanism of myopia formation has not yet been fully understood, and it is generally believed to be the result of congenital heredity and acquired environment. Myopia has a certain hereditary nature, especially high myopia, and the genetic mechanism has not been fully elucidated. Both parents are highly myopic and the chance of myopia in their offspring is almost 100%.

Acquired environmental factors, including modern urban life, less time for outdoor activities, lack of broad vision, too early exposure to electronic products and prolonged close reading, excessive burden of homework in and out of class, unhealthy diet and sleep, etc., are all related to the development of myopia.

Hello, there are many causes of myopia, there are genetic factors, environmental factors, and eye habits and other factors can lead to myopia.

1. Squint. When distant targets cannot be seen clearly, children often resort to squinting to compensate, because the eyelids can block part of the pupil when squinting, reducing diffuse light and reducing the impact of astigmatism, thereby temporarily increasing and improving visual acuity.

2. Blink. Frequent blinking can be programmed to alleviate myopia and increase visual clarity. Many people will see things more clearly when they are in tears.

3. Tilt your head. It often happens that tilting the head to watch TV, also because when tilting the head, it can reduce the interference and influence of some diffuse light, and some children will even develop the habit of tilting their head.

4. Error. The target in the distance is not clear, and I don't say hello when I see acquaintances. I make mistakes during exams, I can trip over or hurt myself when I move in the dark, and some of them have a decline in academic performance, and I often have to borrow other people's notes to copy, etc.

1. Low vision, eyes are often dry and tired, affecting the quality of study, life and work. Wearing glasses for a long time will lead to inconvenience in life and work.

2. Moderate to high myopia will lead to protrusion of the eyeballs, sagging of the eyelids, and affect the appearance.

3. Restrictions on going on to higher education, joining the army, taking the civil service examination and finding a job.

4. After old age, you must wear two pairs of glasses because of dazzling eyes.

5. The incidence of cataract and glaucoma in myopia patients is significantly higher than that of normal people.

6. The main harm is that medium and high myopia, especially high myopia, is easy to cause vitreous opacity, retinal hemorrhage and detachment and cause blindness. According to statistics, eye blindness due to myopia has ranked third after cataract and glaucoma. Due to the above-mentioned hazards, it will seriously affect the physical and mental health of the child and affect his lifelong happiness.

Therefore, myopia should and must be actively prevented and prevented from developing unlimitedly, and there should be a correct understanding of this, both from the students themselves and from the parents.

Internal factors: genetic factors, developmental factors.

Genetic factors: Myopia has been recognized as having a certain genetic predisposition, especially for high myopia. However, this tendency is not evident in general myopia.

In patients with genetic factors, myopia appears at an earlier age, and the degree is more than 600 degrees. 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.

Developmental factors: Babies are hyperopic at first due to their small eyeballs, but as they grow older, the eye axis gradually lengthens, and it develops normally after 6 years of age. If it is overdeveloped, it will form myopia, which is called simple myopia, which mostly starts at school age and is generally below 600 degrees.

If the progression is rapid in the child, it will progress more rapidly by the age of 15 or 20 years, and it will slow down later, and this type of myopia is often higher than 600 degrees, and can reach 2000 to 2500 or 3000 degrees. This type of myopia is called high myopia or progressive myopia or pathological myopia.

1. Genetic factors, in fact, many myopia are caused by genetic reasons, if it is caused by genetic factors, the age of the disease is earlier, but for people with high myopia, there is no family history.

2. Under the influence of environmental factors, if the light is not good, the light is too dark when reading or writing, then reading in strong light will easily form myopia.

3. Bad living habits, reading books when walking, reading books in the car, always shaking back and forth, it will be easy to form myopia.

4. Lack of sleep is also a very common reason, in fact, sleep has a lot to do with one's own myopia, when the lack of sleep will lead to myopia.

Baoding Xinshi Eye Hospital.

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.

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.

Myopia is related to accommodation, that is, when adjusting the resting state, the eye does not use any external force and effort, after the parallel light enters the eye, he is not focused on the retina, he is focused in front of the retina.

In the hyperopic eye, the obvious eyeball is short, and the object image falls in front of the retina, and in the myopic eye, the object image falls behind the retina. Therefore, the retina caused by any reason, his focus should be long, that is, focused in front of the retina, which is manifested as myopia. The main manifestations of myopia are clear near and blurred vision, and the reasons for the formation of myopia are genetic factors and environmental factors.

General genetic factors are said to be high myopia, as if there are more genetic aspects, acquired by the environment, infant and early childhood he behaved normally, and later affected by environmental factors, he formed myopia, which is called acquired myopia, sometimes we also call it functional myopia, so the formation of myopia from the current point of view, is basically these two major factors.

One is congenital, generally congenital myopia when he is two or three years old or even four or five years old, if we find that his myopia degree may be thousands through optometry, which is generally congenital hered.

Environmental factors are mainly long-term close work, such as reading a book, writing, carving, especially now looking at mobile phones, watching TV and other fine work caused by excessive auxiliary adjustment, so that the internal and external rectus muscles, we know that there are muscles outside the eyeball, and its internal and external muscles compress the eyeball, so that the eyeball becomes longer and causes myopia.

On the other hand, long-term close work can make the adjustment tension, eye congestion, and intraocular pressure increase, all of which can make the eye axis longer. Especially in the case of insufficient light, insufficient light, when looking at things, it is generally not clear to see clearly, in order to see clearly, we have to see closely, after working at close range for a long time, in order to see the target clearly, so that the two eyes are very close to the target, which is the main cause of myopia.

Therefore, myopia generally means that acquired myopia is caused by the environment, and at the beginning he is emmetropic, and after poor eye hygiene, he forms a kind of pseudomyopia. After a long time, pseudomyopia, without adjustment, without **, he will become true myopia.

And if you don't use your eyes properly for a long time and don't pay attention to hygiene, the degree of myopia will also increase, and it will develop, and it is often seen in clinical practice that some children may be about 100 degrees of myopia when they are teenagers. When you reach junior high school and high school, you may develop to a degree of myopia, so functional myopia is mainly related to environmental factors, and environmental and genetic factors are also mutually restrictive, and they are not absolutely separate.

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.