Abstract: whether a child will be myopic has a certain relationship with heredity, especially when both parents are highly myopic, the probability of children’s myopia will be greater. Even if they do not become myopic at birth, they will also become carriers of myopia genes. Once affected by the environment, they can develop myopia.
in recent years, the incidence of myopia in children has become higher and higher, which has something to do with the widespread use of mobile phones, iPads and other electronic products. Children under the age of 6 have incomplete eye development. If myopia is not corrected in time, it will affect the development of vision and even develop into amblyopia. In addition to the use of electronic products, overuse of eyes and other reasons, Many other factors can also cause myopia.
1. Overuse of eyes
overuse of eyes is one of the important causes of myopia. Whether reading or watching TV, prolonged use of eyes will cause eye fatigue and damage vision. Therefore, parents must pay attention to remind their children that the eye time should not be too long. It is best to rest for 10 minutes every 40 minutes, and the time to use mobile phones and other electronic products should be shorter. It is best to rest every 15 minutes.
according to experts, whether a child will have myopia has a certain relationship with heredity. Especially when both parents are highly myopic, the probability of children’s myopia will be greater. Even if they do not become myopic at birth, they will also become carriers of myopia genes. Once affected by the environment, they may develop myopia.
in addition, some parents are not myopia, and children may inherit myopia. Because high myopia is an autosomal recessive disease, that is, it will occur only when a pair of genes related to myopia are the pathogenic genes of the disease. If both parents are not myopia, but they are high myopia gene carriers, the child may inherit the myopia genes of both parents, resulting in myopia.
3. Mobile phones, computers and other electronic products
the screen of mobile phones, iPads and other electronic products has various colors and rapid changes, which requires the pupil to adapt to the light of different intensities in a short time, which is easy to cause or aggravate myopia. Moreover, children often stare at the screen for a long time when playing mobile phones or watching TV, which is easy to cause eye fatigue and affect their eyesight.
4. The light is too strong or too weak
we often remind children not to read in places with too dark light, but we often ignore the environment with too strong light. Too strong or too weak lighting is a risk factor for myopia. If the light for children to read is too bright, it is easy to make their eyes tired, resulting in myopia. Therefore, the child’s room should choose a bright, soft and non dazzling ceiling lamp. When studying or reading, adjust the brightness of the desk lamp to the most comfortable gear for the eyes, and the light should be irradiated from the left.
5. The normal development of vision of dystrophic
includes the development of visual organs and optic nerve, which is inseparable from various nutrients such as protein, fat, inorganic salts, vitamins and trace elements. Once there is a lack of nutrients, there may be corresponding diseases and even affect the development of vision.
when sugar in sweets and sweet drinks is metabolized in the human body, it needs a lot of vitamin B1 to help, and will reduce the content of calcium in the body. Vitamin B1 has a protective effect on the optic nerve, and its content will affect the state of the optic nerve. Calcium is the “protector” of eye tissue. Calcium deficiency will not only reduce the elasticity of retina, increase the pressure in crystalline body and lengthen the anterior and posterior diameter of eyeball, but also cause degenerative lesions of corneal ciliary muscle, so as to weaken the elasticity of eye wall and promote myopia.
7. Lack of sleep
lack of sleep will cause systemic autonomic nerve dysfunction, affect the local sympathetic and parasympathetic nerve dysfunction of the eye, and lead to the disorder of ciliary muscle regulation, which is the pathological basis of myopia.
8. Learning to write and draw too early
many children begin to learn to write and draw at a young age. They sit and read for a long time, but using their eyes too early and close will increase the burden on their eyes. In addition, due to the lack of muscle strength and fine movement, it is difficult for children to maintain correct pen holding posture and sitting posture, which may also affect their eye health.
9. Lack of outdoor activities
an Australian study found that children who spend one hour outdoors every day have a myopia rate of about 3%; The daily outdoor activities reached 3 hours, and the myopia rate was only 0.8%. In outdoor activities, the eyes can be fully relaxed, which can prevent or alleviate myopia. Therefore, children must participate in outdoor activities.
10. Brain diseases
some children have vision problems, which may be rooted in the brain, such as cerebral palsy, fetal brain hypoxia, intraventricular hemorrhage, periventricular leukomalacia, hydrocephalus, brain dysplasia, central nerve infection, intrauterine infection and so on.
11. Wrong reading habits
lie down to read, read in a shaking carriage, read while walking, read close to your eyes, read in dim light or sunshine, read without rest for a long time, read books and newspapers with too small font or unclear printing… These wrong reading habits will affect your eyesight.
12. Wrong posture
children’s reading and writing, incorrect sitting posture, inappropriate seat height, etc. will lead to too close distance between eyes and books, thus affecting vision.
13. Psychological factors
some people often hide in the dark or corner to read books because of introversion, which will cause the decline of eyesight; Some people refuse to wear glasses in the early stage of myopia, resulting in decreased vision; Others “expect to wear glasses”. They don’t have myopia, but they wear other people’s glasses indiscriminately. Over time, they slowly develop into myopia.