The prevalence of myopia in China is increasing. The early onset and rapid progression of myopia in younger children have attracted more attention. The establishment of standardized children's refractive development records is the basis of myopic prevention and control. It would be helpful to follow the refractive status and pay more attention to the refractive development of potential myopic children, so as to reduce the prevalence of myopia. (Chin J Ophthalmol, 2021, 57: 724-726).