Inventory: different causes of myopia

Abstract: myopia has a certain genetic tendency. The heritability of high myopia is more obvious than that of general myopia. The incidence rate of myopia is earlier than those with genetic factors, and myopia begins before puberty. And mostly in 6 diopters (- 600 degrees) and above. Myopia has also become myopia, which is a common ophthalmic disease. People engaged in all walks of life should first find out the causes of myopia when they want to prevent myopia. Common causes of myopia: 1. Excessive use of eyes: both work and rest should be combined to ensure the normal rest of the eyes At the same time, don’t use your eyes too much., 2. Air pollution: in today’s era, air pollution is becoming more and more serious. At the same time, the harmful substances of air pollution directly harm the eye organs, so we should eat more vegetables to reduce this pollution., 3. There is still light when sleeping. To a large extent, the eyes are generally in the eyes. Generally, they gradually enter the sleep state at night. If the light is kept on at night, it will lead to no better rest for the eyes, aggravate overwork and cause myopia., 4. Eye distance: if the eye distance is too close for a long time, it will also lead to myopia. Most young people with myopia are too close for a long time. Young people’s eye adjustment is very strong. They can still see objects when the distance between books and eyes is 7-10CM. However, if they often read and write at this distance, their eye adjustment will be very nervous, Thus, flexion can be formed (accommodative) myopia, the so-called pseudomyopia. 5. Incorrect posture: the posture when working or writing or reading will also affect vision. If the table and chair are too low, the head will tilt forward, the spine will bend, the chest will be compressed, and the adjustment of the eyes will be relatively tense. Or the table and chair are too high, the feet are suspended, the lower limbs are easy to swing, and the correct posture can not be maintained, which can cause eye damage Fatigue, over time, is prone to myopia.,

myopia has also become myopia, which is a common ophthalmic disease. People from all walks of life want to prevent myopia when they use their eyes every day. They must first find out the causes of myopia.

common causes of myopia

1. Overuse of eyes: whether working or studying, we should combine work and rest to ensure the normal rest of the eyes, and do not overuse the eyes at the same time.

2. Air pollution: in today’s era, air pollution is becoming more and more serious. At the same time, harmful substances in harmful air pollution directly harm eye organs, so we should eat more vegetables to reduce this pollution.

3. There is still light when sleeping. To a large extent, the eyes generally gradually enter the sleep state at night. If the light is continuously turned on at night, it will lead to no better rest for the eyes, aggravate overwork and cause myopia.

4. Eye distance: if the eye distance is too close for a long time, it will also lead to myopia. Most young people with myopia are too close for a long time, and the adjustment force of young people’s eyes is very strong. They can still see objects when the distance between books and eyes is 7-10CM, but if they often read books at this distance, Writing will make the adjustment of the eyes extremely tense, This can lead to refractive (accommodative) myopia, the so-called pseudomyopia.

5. Improper posture: the posture when working or writing or reading will also affect the vision. If the tables and chairs are too low, the head will lean forward, the spine will bend, the chest will be compressed, and the adjustment of the eyes will be relatively tense. Or the tables and chairs are too high, the feet are suspended, the lower limbs are easy to swing, and the correct posture can not be maintained, which can cause eye fatigue, and myopia is easy to occur over time.

internal causes of myopia

1. Genetic factors: myopia has a certain genetic tendency. The heritability of high myopia is more obvious than that of general myopia. The incidence rate of myopia is earlier than those with genetic factors, and myopia begins before puberty. And mostly in 6 diopters (- 600 degrees) or more. This kind of high myopia is called degenerative myopia in medicine. The occurrence of high myopia in China is autosomal recessive inheritance, that is, both parents are high myopia, and 100% of their children are high myopia. One parent is high myopia, and 50% of their children are high myopia, but there are also manifestations of incomplete vision. Environmental factors play a certain role. Generally, myopia belongs to multiple myopia Factor inheritance not only obeys the genetic law, but also involves environmental factors.

2. Developmental factors: the anterior and posterior diameter of the eyeball of newborn infants is only about 2 / 3 of that of adults, so they are hyperopia. However, with the increase of age, the ocular axis gradually becomes longer. By the age of 15, the eyeballs are basically the same as adults, with a front and rear diameter of 24 mm. If you overgrow and the axis of the eye is too long, it will lead to myopia. This kind of myopia is called simple myopia. Most start at school age. Its myopia is generally lower than 6 diopters (- 600 degrees) stops developing around the age of 20. However, if it progresses quickly in childhood, it will progress faster at the age of 15 ~ 20, and then slow down. Such myopia is often higher than 6 diopters, and can reach 20 or 30 diopters, i.e. lens – 2000 ~ – 3000 degrees. This myopia is called severe myopia or progressive myopia, also known as pathological myopia. This myopia can regress in later life Sexual lesions, visual acuity gradually decreases, and glasses can not correct visual acuity. Most of these eyes eventually cause blindness. Few people are born with myopia, only a few people are born with myopia, and congenital myopia rarely has degenerative lesions.

psychological causes of myopia

1. Conditions are available: many times students use poor eyesight as an excuse to adjust their seats. The latter is an explanation for their grades, which can also avoid heavy learning tasks. Therefore, they will deliberately look at things in the dark to reduce their eyesight, and then often use it to avoid learning. This kind of visually impaired teenagers even have a series of characteristics, such as refusing to attend class, headache, vomiting, nail biting and so on.

2. Hope to wear glasses: many people think that people who wear glasses will look very educated, or think they will look good with glasses, so they will deliberately say that their eyesight is bad in front of others and think of this way to make themselves happyHis eyesight is bad, so he puts on his dream glasses.

3. Too nervous: when you know that your eyesight is poor and there is a threat of myopia, you will worry about the decline of your eyesight. In fact, wearing glasses at this time can protect your eyesight, but you are afraid to wear glasses. When you mention wearing glasses, you are afraid. When you think of wearing glasses, you are nervous. Therefore, he refused to wear glasses for a long time or secretly took off his glasses, resulting in decreased vision.

the above describes how to prevent myopia. We should keep in mind.