Children should grasp four link with its eyes 
 
 
Ohtsubo third military medical university hospital of ophthalmology Xu Yan 
 
 
Source: health 

        Before the age of 3 is the rapid development of visual function, and 3 ~ 13 visual functions into slow development, vision changes (except congenital factors) will be affected by environmental and artificial factors. To guide the children how to use eye health, therefore, it is very important, parents should pay special attention to their children to study and life in the four link of eye health, helping them get through vision development. 
 
        Part one: the good lighting 
 
        Poor quality of lighting is one of the causes of myopia in children and adolescents. Lighting of poor quality mainly include desktop low intensity of illumination, low intensity of illumination uniformity, light stroboscope, glare, etc. The light is too strong or too dark will have an effect on the eyes. Light bright feel dazzling or dizzy, ciliary body tension, easy to cause eye fatigue resulting myopia. Therefore, should be equipped with no stroboscopic, good light source of dome light, desk lamp, avoid under strong light or dark light environment to study. 
 
        Part two: the appropriate range 
 
        With eyes too close or too far, reading, writing posture is not correct, are the important causes of myopia in children and adolescents. Desks and chairs, children will lower the head bent and deviate from the correct line of sight distance; If the tables and chairs are too low, can make entered, curved spine, chest compression, eyes adjust relatively nervous, make the eye fatigue, as time passes is prone to myopia. Parents are the best choice for children adjustable desk and chair, so that as children height growth, adjust the height of desks and chairs. 
 
        Part 3: specifications 
 
        Read and write the correct posture impacts on physical growth of children, and vision protection is essential. The most common mistake, speaking, reading and writing posture is cocked his head to read and write, or reading habits sprawled, low head. Reading and writing must correct posture, the book keep one foot with eyes distance; Books keep the plane and the line of sight Angle 90 degrees, so the retina image formed by the most clearly. Between the body and the desk should keep distance with one punch. When the hand with the tip of one inch to hold pen distance. The process requires parents and teachers to remind and correct. 
 
        Part four: the control electronics 
 
        Electronic products such as mobile phone, tablet, the screen is composed of small sparkle gathered, continuous use half an hour or more to the child the stimulation of the eyes is very big. Therefore, the child time each contact with electronic products should be within 15 minutes. 
 
        In addition, to let the child to eat less sweet food, eating too much sugar, not only easy to damage teeth, can also affect the development of vision. Myopia and lack of sleep. Children should sleep 9 ~ 11 hours a day, can be appropriately nap at noon. (Xu Xianbin zou for spring sorting)
 
 
 
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