Plastic eyes may provide relief from current myopia, with some improvement in daytime vision, but long-term efficacy is uncertain. Everything may return to its original state after stopping wearing the plastic eye R in the near future. Side effects are mainly corneal damage and require parental assistance in care to be effective. Myopia in children is related to both innate development and acquired environment. There are no good preventive measures in the world research, only some experimental studies and recommendations. In order for a camera to take a good picture, it must first focus. The eye is a “dumb camera” that can focus automatically (on the retina), but if the retina is not in its normal position, it cannot see clearly. Eyeglasses are a good tool to help us do this. Once the eye axis grows it cannot be shortened, just as a person’s height cannot be shortened. Factors contributing to the increase in the axial length of the eye may be genetically controlled, and as the body grows and develops, so does the eyeball, which has a tendency to “myopia”. In addition, the eye automatically develops myopia in order to adapt to the need to see things up close for a long period of time, which saves energy, but at the same time the ability to see far away deteriorates accordingly. Thus, low myopia is not scary, but on the contrary, it is an adaptation (or evolution) to the environment, and its advantage is that it is less fatiguing to look at things close up. Plastic lenses are theoretically compressing the eyeball in an attempt to prevent it from growing up, but after all, “man’s plan is not as good as God’s plan”, and growth and development are inevitable. Eye drops work in a similar way, and will not be completely effective. Therefore, there is no so-called cure for myopia. Only by reducing the time spent on looking at near objects, and by frequently looking away from the eye, can the function of looking at distant objects not deteriorate, so as to maintain the current visual acuity. In short, it may be more feasible to control eye use.