During the winter vacation and the Spring Festival, the "little eyes" are busy, swiping their mobile phones, watching TV, and playing games, and they are very busy.
Beware of overuse of your eyes!
If you don't take precautions, children with normal vision may induce myopia, and children who are already myopic may have an increased degree!
How to properly protect your child's eyes, follow alongBeijing Huaxia People's Eye HospitalLet's learn the postures related to myopia prevention and control.
Myopia without glasses,The power grows faster
Many parents believe that the more they wear glasses, the deeper they are. Actually,Pseudomyopia can be recovered by adjusting the eye muscles, and true myopia must be corrected with glasses
Most people subconsciously squint when they can't see distant objects clearly, but frequent squinting not only causes visual fatigue, but also causes eye muscles to compress the eyeball.
Blurred vision itself will accelerate the further growth of the eye axis, and you will not be able to see the blackboard clearly in learning, and you will also bump into objects in life. There are clinical studies that show that:No glassesThe rate of myopia progression is not slower than that of children with glassesAnd even fasterOnce high myopia develops, there is a possibility of other eye complications.
Outdoor exercise is the best way to prevent and control myopia
Myopia is one of the most common eye diseases. For most adolescent myopia patients, in addition to genetic factors, the main reason is improper use of eyes.
The axial length of normal vision is 22 24mm, and more than 24mm is myopia. At present, all myopia and high myopia are due to the long axis of the eye, which has been shown in clinical studiesFor every 1 mm increase in the eye axis, the corresponding diopter is 300d。According to the international sample study, it is shownAn effective way to prevent myopia is to increase the time spent outdoorsChildren and adolescents should ensure at least 2 hours of outdoor exercise time every day.
At present, there are two recognized mechanisms for outdoor light to prevent myopia, one is that the pupil is narrowed by strong light irradiation, and when the pupil is narrowed, the depth of field deepens and inhibits the occurrence of myopia; The other is that natural light from outdoors can cause the retina to release more dopamine, thereby delaying the growth of the eye axis and preventing myopia
Outdoor natural light encompasses a richer spectrum of light, which helps to promote retinal development and improve visual sensitivity. Compared with indoor artificial light sources, outdoor natural light is more conducive to maintaining eye health and reducing the risk of myopia.
Follow scientific myopia prevention and control methods
1. Outdoor activities for 2 hours a day
Children and adolescents should insist on outdoor activities for no less than 2 hours during the day, and outdoor activities are exposed to sunlight, which can increase the release of active substances such as dopamine in the eye, promote the normal development of the eye and inhibit the elongation of the eye axis, which is an effective and economical method for preventing and controlling myopia.
When your child has been using his or her eyes for 20 minutes at close range, looking 20 feet away (6 meters away) for 20 seconds can effectively relieve eye fatigue。In school, eye exercises can also be combined to relieve eye fatigue.
2. Develop good eye habits
Long-term close-up eye use is the key factor that induces the formation of myopia, and children and adolescents should develop good eye habits. Reading and writing should be one foot away from the book, one foot away from the desk, one inch away from the tip of the pen, and sit upright when reading a book or looking at an electronic screen, with a straight head, a straight waist, and a straight back
3. Maintain the standard indoor lighting intensity
Usually the indoor lighting is about 300 to 500 lux; The table lamp used for children's learning is usually only about 1000 lux; But outdoors, even if it is cloudy and evening, it can reach 10,000 lux!
Weizhong Lan et al. compared different light levels and found that strong light (15000 lux) was more significant than ordinary light (500 lux) to thicken the choroids of chicks。Yang Zhikuan's team objectively measured and analyzed the light level of 86 school-age children and found that activity at a light intensity of 3000 lux was a protective factor for myopia, and the longer the exposure to the light level of 3000 lux per day, the less the axial growth decreased
There are two things to keep in mind when studying indoors:
Try to put projects that you use your eyes for a long time in a well-lit place during the day, such as reading, drawing, and doing homework.
Indoors, try to let your child read and write under the eye protection lamp.
4. Eat a balanced diet
In terms of diet, we should eat more fresh vegetables and fruits, and try to make a variety of foodsEat more foods that contain zinc, potassium, calcium, lithium, and vitamins, especiallyElemental calcium intake, not only can help children grow taller, but also play a good role in preventing myopia.
And most importantly:Eat less foods that are high in oil and sugar！Excessive food high in oil and sugar will make myopia deepen in a short period of time, which is very harmful to the eyes.
During the winter vacation and the Spring Festival, the problem of children's myopia cannot be ignored, and parents should first establish a correct concept to scientifically prevent and control the occurrence and development of myopia. Secondly, parents should set an example, accompany and interact as much as possible, and get in touch with the sunshine of nature as much as possible. Beijing Huaxia People's Eye HospitalParents are reminded that the winter vacation is coming to an end, and it is time to give your child a comprehensive vision examination. Only with bright eyes and good vision can we have a more wonderful future.
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References: 1] Wang Yuan, Huang Yunjie. Effect of low-grade myopia with glasses and undercorrection on the development of myopia[J].Int J Ophthalmol, 2012, 12(6): 1200-1201 doi:10.3969/j.issn.1672-5123.2012.06.65.
2] Expert consensus on the application of axial length in the prevention and control management of myopia (2023).
3] International Institute of Myopia. Liu Kang, Gao Jianhua, Chen Zhuo, trans. Report of the International Institute of Myopia on the risk factors of myopia[J].Chin J Experimental Ophthalmology,2022,40(6):562-573
doi：10.3760/cma.j.cn115989-20210611-00355.
4] Notice of the General Office of the National Health Commission on Printing and Distributing Ten Core Knowledge for the Prevention and Control of Myopia in Children and Adolescents
5]lan, w.z., feldkaemper, m. and schaeffel, f. (2013) bright light induces choroidal thickening in chickens. optometry and vision science, 90, 1199-1206. doi.org/10.1097/opx.0000000000000074
6]wen, l., cao, y., cheng, q., li, x., pan, l., li, l., et al. (2020) objectively measured near work, outdoor exposure and myopia in children. british journal of ophthalmology, 104, 1542-1547.doi.org/10.1016/j.exer.2010.10.012
7] Nature Reviews Disease Primers published a long article "Myopia".