I believe that many parents, like me, have received a medical check-up notice from the school, which reads, “Your child XXX, has been examined for amblyopia, please get treatment as soon as possible.” In our clinical work, there are many parents who bring their 3-4 year old children to the doctor because of poor eyesight, they “preconceived” that their children are myopic, only to find out after the examination that their children are actually amblyopic. It turns out that amblyopia and myopia are not a disease at all. “Myopia is a common eye disease that occurs in school-age children and adolescents, and is caused by excessive spasm and tension in the ciliary muscle, the regulating muscle of the eye, or genetics, which causes the cornea of the eye to become more curved, or the diameter of the front and back of the eye axis to become longer, resulting in unclear vision in the distance and clear vision in the near. It is a common eye disease. After the child is examined and fitted with glasses, the corrected visual acuity can be restored to normal. Amblyopia is a disease of delayed and disturbed visual function in preschool children, often accompanied by strabismus, unequal refractive error in both eyes, high myopia, high hyperopia, and severe astigmatism. The child’s vision cannot be corrected to a normal level (below 0.8) even after wearing glasses, and the vision is not good for both distance and near. The two eye diseases are fundamentally different. Since the appearance of both eyes of amblyopic children does not change, it is extremely difficult to detect as in normal children, so it is important to take your child to a professional eye doctor for regular checkups. (2) After changing the direction of the object, observe if your child has a follow-through reaction. (You can choose a group of items from large to small, and the placement should be from near to far). (3) Observe the child’s situation when he looks at both eyes and one eye, and notice whether he likes to come close when watching TV. (4) Whether the child has abnormal head position when looking at things, such as whether he likes to look up or down. (5) Whether the child can gaze steadily when looking at objects. If the child’s eyeballs turn back and forth or tremble, there is a possibility of amblyopia. Tips: When a child reaches 4 years of age, his or her eyes are basically mature and his or her visual acuity should be close to normal 1.0 or so. Therefore, regardless of whether the eyes of a 4-week-old child are normal or not, a comprehensive examination should be done by a professional optometrist as a rule. Normally, if parents find abnormalities in their children’s vision, they should take them to a specialist optometry clinic as soon as possible. Generally speaking, children between the ages of 3 and 4 can already be diagnosed with abnormal vision through a vision chart check.