When the eye is adjusted at rest, equal light from 5 meters away passes through the refraction of the eye, the focal point falls exactly on the retina and can form a clear image, and the eye with this refractive state is called orthokeratology. Its focal point falls in front of the retina and cannot accurately form a clear image on the retina, which is called axial myopia. Limit the time, distance, lighting and posture of reading books, watching TV, computers, etc., and rest for 5-10 minutes every 30 minutes or so. However, this method is not very reliable, because modern students can’t live without reading books, computers, etc., and more and more time is spent “looking close”. Therefore, the priority should be to use the distant mirror to offset the near reflection, and will be reading and writing and so on virtual to look far rest. The more students read and write, the better their eyes rest, the less myopia is likely to develop; Second, reasonable glasses to prevent eye haziness and “squinting” resulting in longer eye axis: no glasses when looking at the distance will eye haziness, can induce chemical changes in the eye leading to longer eye axis; “squinting” to see the eye axis. The “squinting” can press the eye axis, which can cause myopia to occur and develop. 1, more than 50 degrees of myopia should wear a mirror, such as not wearing a mirror, children look at the far object when unclear or squinting, can prompt the eye to become longer, or cause myopia-related factor changes and accelerate the development of myopia. 2, 250 degrees below only when looking at the far or look at the blackboard wear, usually or when reading books do not need to wear (because look near clear, look far hazy). 3, more than 250 degrees should be worn all day (when wearing when not wearing, can be due to frequent eye haziness caused by the development of the eye axis longer). Third, myopia instrument control In principle, more than 2 generations of myopia instrument should be used to control myopia 2 key aspects: look at the near reflection and eye sensitivity decline link. There are more than 30 kinds of domestic myopia devices, however, according to the principle of action, there are only four major categories (i.e., four generations): the first generation of myopia devices (indirect action on the eye with physical methods): such as a variety of vibration, massage, magnetic therapy, electrotherapy devices, etc., is not used when the eye gaze, by stimulating the periocular acupuncture points, etc. to play a role, due to the “look close” reflex no direct effect, so the long-term effect is almost 100 Because there is no direct effect on the “look close” reflex, so the long-term effect is almost 100% bad. The second generation of myopia device (optical methods to offset the near reflection class): such as a variety of distant mirror or defocus mirror, desktop distant mirror, etc., is to use the eye to read writing and look at the computer, through the optical convex prism directly offset about 300 degrees of regulatory myopia, and “look at near” virtual into “look at far “rest. As long as long-term persistent use, the long term effect is better. The 3rd generation myopia device (with optical physical methods to improve eye movement sensitivity class): such as myopic sensitive mirror, eye sensitive resonance mirror, etc., is to prevent the occurrence and development of myopia by training the adjustment sensitivity and visual field sensitivity. The effect is better if used with the 2nd generation myopia device. The 4th generation myopia device (with optical-physical methods to offset near reflection and improve eye sensitivity class): such as myopia automatic control mirror (automatic telephoto mirror), desktop sensitivity memory telephoto mirror, etc. Automatic telephoto mirror can be used to reduce mixed myopia by bifocal lenses to offset the look near response and active zoom telephoto. Since its control of myopia is done during recreational activities such as watching TV and computers, it has an immediate effect. Therefore, it is popular among students, parents and computer operators and is one of the best instruments for controlling myopia. Surgical treatment Before the age of 18, post-scleral reinforcement is feasible to prevent the development of high myopia, and after the age of 18, if myopia no longer develops, excimer laser surgery is feasible. To eliminate myopia.