It is a new type of youth myopia prevention glasses, it is through a physical shaping method, through a reasonable, programmed special design of a rigid keratoplasty lens, night, wear it on the surface of the eye, and then make the cornea in accordance with the reasonable shape we set the deformation, through the corneal shape change can make the youth original myopia, astigmatism some problems to get special effective correction, so that the night wearing the lens, the purpose is to make the myopic cornea into mild myopia or become non-myopic cornea, during the day, the youth because of the corneal shape change, so myopia reduced or disappeared. The purpose of wearing glasses at night is to make the myopic cornea become mildly myopic or not myopic, and during the day, myopia is reduced or disappears because the shape of the cornea has changed, and if used for a long time, myopia can be controlled to a certain extent, and the effect of prevention and treatment of myopia can be achieved. Currently, this is a new technology that has been researched abroad to treat and prevent the aggravation of myopia, and it is a very good technology especially for controlling myopia in teenagers. In general, soft things will change shape with hard things, our eye cornea is soft, myopia prevention keratoplasty lens hardness than the corneal hardness is higher, so in the process of wearing the lens, will gradually through physical methods to make the cornea a shape change, this phenomenon is actually the principle of ophthalmology scientists to invent keratoplasty lens, foreign countries in recent years with this method to produce the cornea A reasonable shaping treatment to prevent and control myopia. The long-term use of keratoplasty lenses does not cause any special adverse effects on the eyes, but the prerequisite for safety is that they should be worn in accordance with the doctor’s instructions and under the premise of scientific and standardized use, which can achieve a safe and effective effect. Therefore, rigid keratomileusis is a safe and effective way to prevent myopia in young people.