Myopia is a state in which distant light is not focused directly on the retina, but rather in front of the retina, in a state of regulatory paralysis. Myopia generally manifests as blurred vision in the distance and clear vision in the near. However, for high myopia, near vision may also be impaired. Myopic patients are more likely to develop flying mosquitoes; myopic eyes have a growing eye axis and thinner retina, so they are more likely to cause retinal detachment; myopic eyes are more likely to cause subretinal hemorrhage, etc., all of which indicate that it is important to prevent and control myopia. Risk factors for myopia 1. prolonged near vision, such as playing with cell phones, iPads, reading books, playing piano, etc.; 2. lack of sufficient time for outdoor activities, studies have shown that more than two hours of outdoor activities during the day can help protect vision; 3. myopia in adolescents is closely related to genetics; how to control it? There is still no clear way to stop the progression of myopia. The existing methods can only slow the progression of myopia. These methods include: bifocals, progressive multifocal glasses, OK lenses, atropine eye solution, etc. Of course, the most important thing remains to be more outdoor activities. Although the above methods can slow down myopia to a certain extent, not every method is suitable for every situation, for example, progressive multifocal glasses are only effective for patients with internal obliquity, and OK lenses cannot be used to correct myopia above 600 degrees. Myopia correction methods for teenagers 1.Frame glasses 2.Soft contact lenses 3.RGP (rigid gas permeable corneal contact lenses) 4.OK lenses (keratomileusis)