Myopia that has developed at the age of 5 does not necessarily grow up to be high myopia. High myopia is defined as myopia of more than 600 diopters, which, in addition to significantly affecting vision, increases the risk of various complications, such as retinal detachment and macular degeneration. The fact that a 5-year-old child has developed myopia indicates that myopia appears early, but it does not necessarily mean that it will develop into high myopia in the future. If the growth of myopia can be effectively controlled, high myopia can be avoided. At present, the main way to prevent and control myopia is to wear keratoplasty lenses to correct the existing myopia, to order low concentration atropine eye drops to control the growth of myopia, as well as to increase the amount of outdoor activities and reduce the amount of time spent on near eye use, in order to slow down the growth of myopia. Specific medication should be administered under medical supervision. When myopia occurs at the age of 5, parents are advised to take their children to the doctor for regular checkups in order to monitor whether the eye axis and myopia are growing too fast. If the number of myopia grows too fast, timely intervention should be taken under the guidance of a doctor.