What is visual retardation? A child with delayed vision development has a degree of congenital refractive error, or due to the young age, vision has not developed to normal levels, the speed of vision development and the degree of vision development is different for each child, just like we usually look at the growth of children, some children are growing fast in elementary school, some children are growing fast in middle school, and even some children go to college children grow, so that each different The development of the child’s vision is different, so clinically some parents often ask us how much the normal development of vision of a three-year-old child should reach. We can’t give a general answer to this question, but there are two important things, for children with abnormal vision, first of all, you should go to the hospital to do an optometry for your child to see if there is more than normal myopia, hyperopia, astigmatism. If there are these abnormalities should the child immediately wear corrective glasses. Also compare the corrected visual acuity with that of children of the same age in the same class to see if there is a big difference. Ultimately, of course, the ophthalmologist should decide whether the problem is amblyopia or visual retardation. The relationship between amblyopia and retarded vision is not a disease, but at the same time, they are inextricably linked. At the same time, even if a child is considered to be visually retarded, he or she should go to the hospital frequently for examination and observation. Do not delay the condition. There are two types of retarded children: those with refractive error, which should be adequately and promptly corrected, which means wearing appropriate glasses. If the child’s vision does not reach normal after wearing glasses for a period of time, he or she should be treated in accordance with the usual methods for amblyopia. Children who do not have refractive error can be left untreated for the time being and observed regularly in outpatient clinics and, if necessary, once a semester in outpatient optometry. It is not easy to identify whether a child has amblyopia or visual retardation clinically, so you should go to the hospital and ask your doctor to confirm the diagnosis.