In recent days, 9-year-old Xiao Kun always felt blurred vision, and also felt dizzy and swollen eyes from time to time. The anxious parents took him to the ophthalmology examination and realized that Xiao Kun’s vision had dropped sharply from 1.2 to 0.6 in just half a month, which was caused by playing online games. Fortunately, the diagnosis was timely and it was only pseudomyopia. However, if pseudomyopia is not treated in time, it will further develop into true myopia. The prevention of real myopia in teenagers should start from the prevention of pseudomyopia. Prevention of pseudomyopia should pay attention to the following aspects: 1. Try to avoid prolonged, excessive eye use at close range. After 40-60 minutes of continuous eye use, you should take a break for 10-15 minutes. You should do some sports after doing homework, or close your eyes and look into the distance. Don’t read books with too small or unclear handwriting. Keep your eyes about 1 foot away from the writing when reading or doing homework. It is not good to have too much light when reading a book, and it is not good to have too much darkness. When watching TV, the distance between the eyes and the TV should reach 4-5 times the diagonal of the TV. 2, change the wrong concept of eye use. Some parents attach great importance to their children’s learning, once the child myopia, ask the teacher to change a seat in front. I don’t know, this is harmful but not beneficial, because myopia itself is a long time near eye use caused. 3, adhere to the daily eye exercises, crystal exercises (rhythmically and quickly alternate look far look near), self-acupressure. 4. Pay close attention to changes in vision. Generally 3 to 4 years old children can learn to measure vision, should regularly go to the regular hospital ophthalmology test vision, do not rely on the experience of adults to judge the child’s vision. 5, scientific optometry. Many people think that the measurement of visual acuity is optometry, which is wrong. The formal medical optometry should be dilated to check the shadow, for different patients should use different dilating drugs. When a child is found to be nearsighted (not seeing clearly at a distance but seeing clearly up close), there are three possibilities: true myopia, pseudomyopia, and both true and pseudomyopia. If the child does not undergo medical astigmatism, it is likely that the pseudomyopia will be treated as true myopia or that the true myopia with pseudomyopia will be mistaken for the true myopia and will be fitted with unsuitable glasses. If the pseudomyopia is once fitted with myopia glasses, then the pseudomyopia will also become true myopia.