Abstract: read in places where the light is too bright, too dark, glare and reflection. If the light is too strong, it will cause strong reflection, stimulate the eyes, make the eyes uncomfortable and make it difficult to see the font; If the light is too weak, the written lighting is insufficient, and the eyes cannot clearly see the font, the head will move forward and get close to the book. Both of the above conditions will lead to eye fatigue, excessive adjustment or spasm and form myopia.
1. Genetic factors
children whose parents are myopic and children whose parents are myopic have a higher risk of myopia than ordinary children. Experts say that genetic factors play an important role in the occurrence and development of myopia. If one of the husband and wife is myopic, the probability of children’s myopia is about 50%; Both husband and wife are nearsighted, and the probability of children’s nearsightedness is as high as 85%.
2. Environmental factors
read in places where the light is too bright, too dark, glare and reflective. If the light is too strong, it will cause strong reflection, stimulate the eyes, make the eyes uncomfortable and make it difficult to see the font; If the light is too weak, the written lighting is insufficient, and the eyes cannot clearly see the font, the head will move forward and get close to the book. Both of the above conditions will lead to eye fatigue, excessive adjustment or spasm and form myopia.
read in a bumpy environment. In order to make full use of time, some teenagers will read while walking or in the carriage, which is very bad for their eyes. Because the carriage vibrates, the body shakes, the distance between eyes and books cannot be fixed, and the poor lighting conditions aggravate the burden on eyes. Often this may cause myopia.
3. Behavioral factors
too little outdoor sports and too much close eye use, long-time reading and playing with mobile phones. Most teenagers don’t rest for 3-4 hours, such as reading books, doing homework and watching TV. In this way, the muscles inside and outside the eyes are in a tense state for a long time and can’t rest. Over time, when looking at a distance, the muscles of the eyes can’t relax and show a spasm state. When looking at a distance, they feel blurred and form myopia.
incorrect writing posture. If you often read and write too close, the adjustment of your eyes will be very tense, Thus, refractive (accommodative) myopia can be formed, that is, the so-called pseudomyopia. If the long-term adjustment is excessive, the ciliary muscle can not flex flexibly, the extraocular muscle exerts pressure on the eyeball, the eyeball wall is compressed and gradually extends, and the anterior and posterior axis of the eyeball becomes longer than the normal value, forming axial myopia, the so-called true myopia.
Less sleep. Children who sleep less are prone to myopia. In children’s rapid growth and development period, especially when they are 7-9 years old and 12-14 years old, if they sleep less, they will cause myopia in some children.
4. Disease factors
some diseases can also cause myopia.
are 3 major methods for children to prevent myopia:
and 1. Increasing outdoor exercise time,
research shows that increasing outdoor activities can effectively reduce the incidence rate of myopia. Some scientists have done such experiments. In the experiment, students A group had more than one hour outdoor activity time than students B group, and three years later, the incidence rate of myopia was compared. The experiment confirmed the conclusion that outdoor exercise can inhibit the occurrence and development of myopia. Therefore, for children who want to prevent myopia, the outdoor activity time is at least 2 hours, and 3 hours is better. However, it should be noted that do not expose yourself to the sun in summer, and do not look directly at the sun with both eyes, so as not to burn the retina and cause permanent visual damage.
2. Establish the archives of refractive development
start to do a comprehensive optometry every year at the age of 3 ~ 6 and establish the archives of refractive development. After the child is 3 years old, parents should take the child to a professional eye hospital for a comprehensive optometry examination 1 ~ 2 times a year, including diopter, eye axis length and corneal radian, to see whether the child belongs to the high-risk myopia group, and reasonably intervene the occurrence and development of myopia through years of testing.
3. Scientific eye
1 Pay attention to the correct posture when reading and writing. Don’t read or use your mobile phone when walking or riding.
2. Don’t use your eyes for a long time and rest for 10 minutes every 50 minutes or so.
3. Ensure adequate sleep time.