The best age for amblyopia treatment is usually before 6 years old, but 6 years old is not an absolute age limit. It is recommended to detect and treat amblyopia as early as possible, for example, if a child is found to have ptosis at around 2 years old, the eyelid has already blocked about 2/3 of the pupil, which can cause form deprivation amblyopia. Therefore, it is important to remove the cause of amblyopia as early as possible, and then with proper treatment and correction, the child’s vision can soon be improved. By the same token, early detection and treatment of other amblyopia is also recommended. Parents should make sure to have their children’s eyes examined and vision checked regularly in the hospital during the critical developmental period, such as within 3 years of age. If some of the causes of amblyopia are found during that period, they can be treated early and not delay the best time for amblyopia treatment. Amblyopia treatment for children is best before the age of 6, because before the age of 6 the child is in the preschool stage, and at the same time the child will cooperate very well with the doctor, and the parents will also look after the child very well. After the child goes to school, the correction of amblyopia will be relatively troublesome and difficult to cooperate with. Therefore, amblyopia treatment is recommended to be detected and treated as early as possible.