I. Analysis of the causes: Students’ myopia develops quickly and is poorly controlled for the following reasons; 1. Failure to control the main root of myopia in students – “looking at the near”, due to a large number of homework, study tasks or playing computer games online, these processes of looking at the near will lead to Myopia factor accumulation, and a large number of myopia accumulation is not actively eliminated, then myopia control failure. 2, the main cause of myopia in students – faster growth and development caused by myopia development is difficult to control, you can do an annual ultrasound examination of the eye axis to understand the changes in the eye axis 3, wearing glasses caused by irregularities. Myopic defocus stimulation or form deprivation myopic stimulation, such as myopic lens prescription is too high, corrected visual acuity of 1.2 or more or glasses prescription is too low, or the lens is too flowery, etc. caused by blurred retinal image, similar to form deprivation. 4, the eyes look close for a long time, less activity, resulting in adjustment lag, thus causing the eye axis to become longer. Every 1mm long will increase 300 degrees of myopia. The main cause of myopia in students is “looking at the near”. 2, the joint use of eye sensitivity telephoto mirror, strengthen the eye focus sensitivity, prevention of adjustment lag caused by myopia occurrence, development. 3, for the stubborn best to use 1 ~ 2 generations of automatic farsightedness every day, combined with the terminal myopia control method, every night before bed (terminal) to read books automatically produce 300 ~ 500 degrees of farsightedness (i.e., front defocus refraction), so as to offset the accumulation of myopia caused by reading, writing, looking at the computer, etc. during the day, strengthening the effect of myopia prevention.