How is myopia caused? How myopia is caused

How is myopia formed? The development of most low- and medium-to-moderate myopia is related to hyperopia during eye development. Myopia is a period of rapid development at the age of 12 to 18, and this is precisely because teenagers have a strong desire for knowledge, read a lot, are busy with homework, and because of watching TV, playing computers, playing game consoles, etc., outdoor activities are significantly reduced, and they are in a state of myopia for a long time; Some people neglect eye hygiene, do not pay attention to distance and posture when reading, do not pay attention to lighting and time, resulting in eye hygiene and excessive nearsight at this age at the same time as the eye development stage, in this state, the ciliary muscle continues to contract for a long time, first forming an accommodative spasm, and then further developing into myopia.

According to the survey, the number of myopia patients with 2 hours of extracurricular reading time in this age group is twice as high as the number of myopia patients with 3 hours of extracurricular reading time, which shows that excessive nearsightedness is the most important cause of myopia. At this time, if you take nutrient eye solution in a timely manner, because it has the effects of nutrition, lubrication, antibacterial, and itching, it can activate the tired ciliary muscle, effectively relieve visual fatigue, and prevent the formation of myopia.

In second place is the genetic factor. According to statistics, if the number of myopic patients with no myopia in one parent is used as a benchmark, the number of myopic patients with one parent is doubled, and the number of myopic patients with both parents is doubled. In the eyes of moderate to high myopia, the genetic predisposition is more obvious.

Myopia can also occur due to changes in the refraction of the lens or cornea, such as diabetes, early cataracts, glaucoma, keratoconus, and lens displacement.

Myopia is a manifestation of refractive error. The formation of myopia is mainly due to our usual excessive use of eyes, fatigue of the eyes, especially at close range, long-term fatigue of the eyes, especially easy to make the eyes adjust the vision of these muscles, tension, after the tension of our adjustment function is unbalanced, the production of external parallel rays, when entering our eyes, can not carry out normal refraction. It cannot be refracted normally on our retina, but is formed in front of the retina, so this kind of myopia is formed in this way.

After myopia is formed, it will slowly progress, so in the later stage it will develop into a structural change, the so-called true myopia. The structural changes are mainly reflected in the growth of the eye axis, which will grow longer than the average for this age, or the steepness of the corneal curvature, which can be seen from the topographic map, and it is getting bigger. In this case, it is impossible for us to reverse to a normal state, so people often ask, after myopia occurs, can I still return to normal, if you are a true myopia patient who has undergone structural changes, then it is impossible for you to return to normal.

But if you are lucky enough to be a pseudomyopia patient who has not undergone structural changes, you can still return to normal through various physical methods.

Expert tips: The formation of myopia is mainly due to the usual excessive and tired eyes, especially the close-range and long-term fatigue of the eyes, which is particularly easy to make the muscles of the eye to adjust the vision tense, the adjustment function is unbalanced, and the parallel light from the outside world is generated.

According to years of assessment and data analysis by ophthalmologists, myopia is a disease that is directly related to genetic factors and environmental factors. The internal cause is multi-event, and the external cause is to see things up close for a long time, so that the ciliary muscle in the eyeball compresses the lens for a long time, resulting in the lens cannot be restored (thicker than the natural one), so myopia occurs.

Genetic factors: Studies have shown that the incidence of myopia in the next generation is higher in two-parent families with high myopia, and it has been recognized that myopia has a certain genetic predisposition, especially for high myopia. However, the genetic predisposition to myopia in general is not obvious.

Environmental factors: The occurrence and progression of myopia is closely related to the use of near eye. When reading, writing and other close work, not only the adjustment of the eye is needed, but also the double eyeball should be cohesive, so that the extraocular muscles exert a certain pressure on the eyeball, and over time, the anterior and posterior axes of the eyeball may become longer.

Every 1 millimeter of myopia grows to the diopter (that is, the common 300 degrees), of course, the vast majority of this myopia is simple myopia, the general power is relatively low, are below 6 diopters, the onset is mostly around puberty, and the progress is relatively slow, some people call this myopia true myopia, in order to distinguish it from pseudomyopia.

The cause of myopia is not fully understood, and most scholars and researchers believe that the occurrence of myopia is related to a variety of factors, including genetic factors, environmental factors, as well as daily eye hygiene, eye habits, etc., as follows:

1. Genetic factors, after a large number of investigations, it has been shown that myopia, especially high myopia, has a certain genetic tendency, and will show familial aggregation. If both or one of the child's parents is nearsighted, especially if the child is highly myopia, the child is more likely to develop myopia.

Second, environmental factors are more applicable to Chinese teenagers, because the homework burden of Chinese teenagers is relatively heavy, and the incidence of myopia in children is particularly high for long-term close eye use. If you don't pay attention to the ambient lighting in the process of learning, the environment is dark, or the words in the book are very small, it is even worse, plus the reading time is particularly long, and there is a lack of outdoor activities, the incidence of myopia is particularly high.

3. Inducing factors, some studies have shown that for example, the lack of a certain trace element, the dietary components in the food are not very balanced, and even air pollution, such as the current haze weather, may be the cause of myopia.

Fourth, the most important thing is that due to the widespread popularity of electronic products such as ipads and mobile phones in recent years, some children have been looking at these things at close range for a long time, which will also promote the occurrence and development of myopia.

The causes of myopia are not fully understood, and most scholars believe that myopia is related to a variety of factors, including genetic factors, environmental factors, and poor eye habits.

Essential**. Genetic factors.

A large number of surveys have shown that myopia has a certain genetic tendency, and it is often seen that families are clustered, and both parents or one parent are myopic, and the likelihood of myopia in children will increase. Among them, it is clear that the occurrence of high myopia is autosomal recessive.

Environmental factors. The incidence of myopia in patients with long-term near eye use is relatively high, which is also the main reason for the high incidence of myopia among adolescents in China. If you add to the factors such as poor ambient lighting, too small or blurred reading handwriting, too long continuous reading, and lack of outdoor activities, it will further promote the occurrence and development of myopia.

Predisposing factors. Studies suggest that micronutrient deficiencies, nutrient imbalance and air pollution may all be predisposing factors for myopia.

With the popularity of electronic products in recent years, long-term close viewing of electronic screens may also promote the development of myopia.

Myopia is mainly caused by inattention to the usual use of the eye, and the other part is related to genetics.

Probably genetic, the doctor said when I was wearing glasses.

The occurrence of myopia is related to genetic factors, environmental factors, poor eye habits and other factors, and the exact pathogenesis is still unclear.

3. Bad eye habits: incorrect posture of reading and writing, too close to the eyes and books, or reading for too long, or walking, sitting in the car to read, etc.

When looking at near objects, the ciliary muscles contract and the ciliary band relaxes, the lens thickens due to its elastic retraction, and the pupil dilation muscle contractions to make the pupil wide, and the refraction is enhanced, so that the image entering the eye can focus on the retina. When looking at distant objects, the ciliary muscles relax, the ciliary band is tightened, the lens is thinned, the pupil is narrowed by the contraction of the pupillary sphincter, and the image of the refractive attenuation remains on the retina.

Myopia: The ciliary muscles are tense and the lens thickens.

Farsightedness: The ciliary muscles relax (or even stretch) and the lens becomes thinner.

If the adjustment function is insufficient and the number of sails cannot be normalized, the object image falls on the retina, it is a refractive error.

Myopia is caused by excessive elongation of the eye axis or excessive refractive power of the corneal lens, which causes the external light to pass through the refractive system of the eye, that is, the cornea and the lens, and the focus is not focused on the retina, but in front of the retina, resulting in blurred projection on the retina and decreased vision.

Myopia is usually the result of a combination of genetic factors and environmental factors, and myopia is a polygenic genetic disease. At present, it is not possible to accurately ** the probability of myopia in the offspring of the myopia family, but if there are multiple myopia patients in the family or patients with high myopia, then the risk of myopia in the offspring is higher than that of the general population. Environmental factors also play an important role in the occurrence of myopia.

If you don't pay attention to eye hygiene, long-term close eye use and watching mobile phones, TV, computers, etc., will greatly increase the risk of myopia.

Therefore, in order to prevent and control the growth of myopia, it is necessary to pay attention to the rational use of eyes, protect the eyes, avoid long-term close-up eye use and less look at hands, TV, and computers. Every half an hour to 40 minutes, you should stop and rest for 10 minutes to let your eyes be fully relaxed, so as to delay the growth of myopia to the greatest extent.

Causes myopia.

One of the main principles of BAI is that the ability of the lens and ciliary muscle to regulate is weakened, and the ability of the lens and ciliary body to restore and improve the ** joints of the lens and ciliary body can be answered.

Traditional Chinese medicine massage techniques are used to improve the visual acuity by opening the meridians and increasing the nutrient supply of the lens and ciliary muscles, so as to improve the ability of the lens and ciliary muscles.

Myopia occurs BAI

There are many reasons for this.

Du, the main reason is that there is too much nearsight work. Other DAO causes include eating too much sweets and not doing too much outdoors. China's homework burden is particularly heavy, and many children begin to use their eyes at close range with high intensity when they are young, including reading books and electronic products, and the corresponding outdoor activities and sun exposure time are significantly reduced.

According to international research, only a long enough outdoor activity time and enough physical exercise and light can effectively reduce the incidence of myopia. As a parent, you should give your child more opportunities, cultivate children's habits from an early age, go outdoors to participate in physical exercise, bask in the sun often, participate in various activities, and reduce the use of eyes at close range.

Myopia prevention and control is not only a problem that children and parents need to pay attention to, but also requires the joint efforts of the whole society to comprehensively prevent and control myopia.