Abstract: many parents will pay attention to their children’s reading posture and reading time. However, few parents will notice that children’s reading is the source of light, but in fact, the source of light is one of the keys to children’s myopia., According to the survey, there are nearly ten million people with low vision in China, especially among children and adolescents. The incidence rate of primary school myopia is 22.78%, 55.22% for middle school students and 70.34% for senior high school students, according to ancient Chinese literature search. What is more shocking is that a survey report said that more than 300000 people in China have been blinded by high myopia. The incidence of myopia among adolescents in China ranks first in the world. Therefore, the prevention and treatment of myopia in children and adolescents has attracted more and more attention from students, parents and society., Light source is one of the key reasons for myopia. Experts say that many parents will pay attention to their children’s reading posture and reading time. However, few parents will notice that children’s reading is the source of light, but in fact, the source of light is one of the keys to children’s myopia. Most people are used to writing with their right hand. The correct light source should come from the upper left corner and shine on the book, so as to ensure that the shadow of their hand or head will not fall on the book and cause visual fatigue., If the light comes from the right side or the top of the head when the child is reading, when he is writing or when he is lowering his head, there will be a shadow falling on the book, so that the place where the book is not covered by the shadow is brighter and the place covered by the shadow is darker. When children read, their eyes swim back and forth in the bright and dark areas, and the muscles of their eyes are constantly adjusted, which is easy to lead to visual fatigue and myopia in the long run. Therefore, when designing desks for children, parents must also consider the placement of desk lamps, and try to let the light source shine on the books from the upper left corner., The height of the desk in the classroom cannot be unified. In addition to the light source, there is another small detail that is easy to ignore to prevent myopia. At the beginning of school, when parents send their children to school, they see brand-new desks in the classroom, neatly arranged in the classroom, not to mention how happy they are. However, the neat desk also hides a small hidden danger of myopia., Experts tell us that because children’s growth and development are different, of course, there will be obvious differences in height even at the same age, so teachers usually arrange taller students to sit in the post comparison position and shorter students to sit closer to the podium, To ensure that each child will not be blocked by the person in front of the blackboard. The teacher’s starting point is good, but the teacher missed a small detail., Because the students are different in height, the height of the desk should also be adjusted according to the child’s height. For example, the table of tall children should be slightly higher than that of short children to ensure that each child’s posture of reading with his head down is within the correct range. If the height of all children’s desks in the class is adjusted on the same plane in order to look neat and unified, the short student may have his eyes too close to the book when reading, resulting in myopia. The tall student may deliberately bend down when reading because he is too far away from the book, resulting in poor reading posture, It is not conducive to the development of children’s spine.,
according to the survey, there are nearly ten million people with low vision in China, especially among children and adolescents. The incidence rate of primary school myopia is 22.78%, 55.22% for middle school students and 70.34% for senior high school students, according to ancient Chinese literature search. What is more shocking is that a survey report said that more than 300000 people in China have been blinded by high myopia. The incidence of myopia among adolescents in China ranks first in the world. Therefore, the prevention and treatment of myopia in children and adolescents is more and more concerned by students, parents and society.
light source is one of the key causes of myopia.
experts say that many parents will pay attention to their children’s reading posture and reading time. However, few parents will notice that children’s reading is the source of light, but in fact, the source of light is one of the keys to children’s myopia. Most people are used to writing with their right hand. The correct light source should come from the upper left corner and shine on the book, so as to ensure that the shadow of their hands or heads will not fall on the book, causing visual fatigue.
if the light comes from the right or top of the head when the child is reading, when he is writing or when he is lowering his head, there will be a shadow falling on the book, resulting in a brighter place where the book is not covered by the shadow and a darker place where the shadow is covered. When children read, their eyes swim back and forth in the bright and dark areas, and the muscles of their eyes are constantly adjusted, which is easy to lead to visual fatigue and myopia in the long run. Therefore, when parents design desks for their children, they must also consider the placement of desk lamps, and try to let the light source shine on the books from the upper left corner. The height of desks in
and
classrooms cannot be unified. As for
and
, in addition to the source of light, there is another small detail that is easy to ignore to prevent myopia. At the beginning of school, when parents send their children to school, they see brand-new desks in the classroom, neatly arranged in the classroom, not to mention how happy they are. However, the neat desk also hides a small hidden danger of myopia.
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experts tell us that because children’s growth and development are different, of course, there will be obvious differences in height even at the same age, so teachers usually arrange taller students to sit in the back position and shorter students to sit in the position closer to the podium, To ensure that each child will not be blocked by the person in front of the blackboard. The teacher’s starting point is good, but the teacher missed a small detail.
because the students are different in height, the height of the desk should also be adjusted according to the child’s height. For example, the table of tall children should be slightly higher than that of short children to ensure that each child’s posture of reading with his head down is within the correct range. If the height of all the children’s desks in the class is adjusted on the same plane in order to look neat and uniform, that’s rightShort students, when reading, their eyes may be too close to the book and lead to myopia. Tall students, when reading, may deliberately bend down and lower their head because they are too far away from the book, resulting in poor reading posture, which is not conducive to the child’s spine development.
so the height of the desk in the classroom is also one of the problems that parents and teachers need to pay attention to. Prevent children from looking at the blackboard from one direction, which will lead to neck and eye fatigue. Teachers should adjust seats for children with similar height every 1-2 weeks.
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use computers and mobile phones. You should take a break in 40 minutes.
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now everyone’s life is better. Children’s toys have changed from rubber bands and marbles to mobile phones, computers, iPads and other electronic products. Some children don’t leave their hands when they eat and rest. They are typical “it fans”. Will playing mobile phones and computers with such high intensity also have a bad impact on children’s vision?
Professor Tang Youzhi gave a positive answer. The imaging process of mobile phones and computers will be accompanied by the stroboscopic phenomenon of light. Because the stroboscopic speed is relatively fast, it is generally difficult to see by the naked eye, but it does not mean that it will not cause damage to the eyes. It is easy to cause visual fatigue when facing mobile phones and computers for a long time.
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so Professor Tang Youzhi suggested that children should use mobile phones and computers as little as possible to play games. If they really need to use computers, they should rest every 40 minutes to an hour. Each rest should be more than 10 minutes. During the rest, they can see the scenery and trees in the distance, You can also do eye exercises to relieve eye fatigue. Even for adults, white-collar workers who often work on computers should ask themselves to give their eyes a rest time.
myopia is an ophthalmic disease. If it is not treated or prevented in time, it may aggravate the degree of myopia and even lead to blindness. Practical medicine shows that people with high myopia are likely to suffer from eye diseases leading to blindness, such as cataract, glaucoma and retinal damage. Therefore, the prevention and treatment of myopia must not be taken lightly.
now more and more people are nearsighted, from college students to white-collar workers, especially those who operate computers. These myopic friends should be careful of complications, serious complications and the risk of blindness. The main complications of
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are:
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, cataract, glaucoma,
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, and high myopia incidence rate of open angle glaucoma is 6 to 8 times higher than that of ordinary people. The decline of visual function is often covered up by the symptoms of high myopia, which is easy to be ignored.
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are also common in high myopia with posterior polar cortical opacification of the amygdala, and the dark adaptation time is relatively prolonged because the pathological changes of pigment epithelial cells in high myopia affect the reaction process of photochemical changes of visual cells.
flying mosquito disease
high myopia can produce real vitreous degeneration or liquefaction, causing obvious flying mosquito disease. Consciously float the light, spark, flash or shadow in front of you.
posterior scleral staphyloma
is mainly manifested in the backward expansion of the posterior pole of the eye, which is the degeneration and atrophy of the nerve and the retina around the macula, and the decline of corrected visual acuity. The higher the degree of myopia, the higher the incidence.
retinal degeneration, hemorrhage, hole and detachment
due to the lengthening of the ocular axis, the thinning of the posterior half of the eyeball, the atrophy and degeneration of the retina and choroid, there are holes, leading to hemorrhage and retinal detachment of different ranges, resulting in visual loss. In addition, macular degeneration is also the biggest risk of high myopia, which shows visual deformation, vision decline, and eventually lead to blindness.