With the continuous development of science and technology, people's living standards have been continuously improved, television has been basically popularized, and computers have gradually entered people's families. The long-term radiation of electromagnetic waves is quietly endangering people's eyes; The continuous increase of urban high-rise buildings has also reduced the space for urban population to use their eyes and outdoor activities for a long time; Mechanized equipment has gradually replaced the labor force, and the time for close-up eye use such as fine work has gradually increased, and many people's eyes are in a state of long-term adjustment tension. Due to various reasons, the nearsighted population in China has developed rapidly. According to the records of relevant departments, myopia patients in China have accounted for nearly 30% of the total population. It can be seen that the prevention of myopia has become an urgent social problem, and the society has delayed many enrollment and employment opportunities because of poor eyesight. The demand for awning vision is getting higher and higher. Some students with excellent academic performance should pay more attention to the importance of preventing myopia and do a good job in customer promotion because they are practitioners in the glasses industry. The object of general education is teenagers or students at school. The contents of education are as follows: 1. Adequate light and comfort: Adequate and comfortable light can get good visual information. Too strong or too weak light will have a bad effect on the eyes. If you use your eyes at close range under strong light (such as sunlight) for a long time, the pupil will shrink continuously, causing the pupil sphincter to contract for a long time, resulting in symptoms such as pupil sphincter spasm and eyeball swelling. Moreover, because the light is too strong, the macular area of the retina is stimulated by strong light, which will cause light damage to the retina, cause unclear vision, reduce visual sensitivity, and even cause permanent vision loss. On the contrary, if you read in too weak light (such as street lamps) for a long time, the pupil dilator will continue to contract, and adjusting the light entering the eyes will also cause symptoms such as visual fatigue and pupil dilator spasm. Generally, the indoor illumination is between 4m-M-700, and the 60W incandescent lamp can be placed in the upper left corner of the desk for home lighting. Second, the reading time should not be too long: if you use your eyes at close range for a long time, the ciliary muscles are in an adjustment state for a long time, which is easy to cause accommodative (or functional) myopia, that is, pseudomyopia. Moreover, because the extraocular muscles exert pressure on the sclera tissue of the eye wall, the axial length of the eye gradually becomes longer, thus forming true myopia. Therefore, whether reading or doing homework, the time should not be too long, and it is generally appropriate to rest for 30-40 minutes. Third, the sitting posture is correct and the distance is moderate: don't hunch over or read on the table, and you can't read in bed. The distance between your eyes and the book should be about one foot (3cm-35cm). Keep a palm distance between your body and the table. When holding a pen, keep your hand one inch away from the nib, and the nib should not be too thin. The desktop design is preferably 12. - 15。 The slope, books and desks should be kept at 30. -45。 If the book is placed horizontally on the desktop, it is necessary to lean forward slightly when reading, forming an almost right angle (when the plane of the book is at right angles to the line of sight, the image on the retina is the clearest), which is easy to cause fatigue of the neck muscles and neck ridges, and unconsciously lean forward, leading to decreased vision. Fourth, watch less TV and use less computers: try to avoid contact with TV, computers and other electrical equipment that have radiation to the human eye. Because the X-rays radiated by the picture tube can consume a lot of rhodopsin in the retina, the vision can be obviously reduced. Generally, the time spent watching TV or using the computer should be controlled within 1@2 hours, and you should always close your eyes to rest or look down for a moment. The distance between the eyes and the TV is about 6 times the diagonal of the TV screen. The distance between the eyes and the computer should be kept at about 6ocm-7ocm (too far to see clearly, too close to use excessive adjustment). It is best to keep the TV screen at the same level as the eyes, and the contrast of the TV set and the brightness of the room should be soft and appropriate. If the contrast between indoor light and TV brightness is too large, it is easy to cause visual fatigue. In addition, it is best to install protective devices on TV screens and computer LCD monitors to reduce the harm of electromagnetic waves to eyes. 5. Normal sleep protects vision: work and rest should be regular and sleep should be adequate. Lack of sleep can often lead to conjunctival congestion, increased secretions, photophobia, tears and other conjunctival and corneal inflammation. Lack of sleep, physical fatigue, easy to cause pseudomyopia. Protect your eyes and try to avoid the damage of sand, smoke, ultraviolet rays, infrared rays, chemicals and medical supplies to your eyes. Personal hygiene should be maintained, towels, washbasins, handkerchiefs and other personal items should be used by special personnel, and try not to use other people's items. In order to avoid cross infection, 5 1 eye disease. Causing vision loss. In addition, children should try not to play with dangerous toys or sharp tools (such as knives, scissors, toy guns and awls). ) avoid accidents such as eye injuries. Sixth, eye exercises, outdoor sports: doing eye exercises is a concrete manifestation of our primary and secondary schools attaching importance to eye health care; By massaging the acupoints and muscles around the eyes, nerve endings are stimulated, blood circulation in the eyes is increased, blood is redistributed, and eye metabolism is adjusted, so as to achieve the purposes of eliminating fatigue, enhancing eyesight and preventing myopia. Usually do it once every morning and afternoon. When doing exercises, you should pay attention to moderate massage, find the right acupoints, concentrate your thoughts, close your eyes and watch for a while after you finish. In addition, exercise regularly and do some sports (table tennis is the most eye-catching sport). More contact with natural scenery such as green mountains, green waters and fields is also helpful for the health of eyes. Seven, pay attention to the diet structure, not partial eclipse: the nutrient intake should be reasonable, partial eclipse or too much sugar and protein, will lead to myopia. Eat more vegetables, fruits, liver, fish and other foods. Vitamins are essential substances for the new generation of human body. If you take too much or not enough vitamin 565,438+0, it may lead to eye diseases. See the table below: 8. Check your eyesight regularly: Under normal circumstances, the refraction of human eyes may change in about 3 months, so check your eyesight regularly to achieve early detection, early correction and early treatment.
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