The human visual system is constantly stimulated by light, color, moving objects and various complex images after birth, and progresses from light perception only to 0.2 or better by 6 months of age, to basic maturity at the age of 3 to 5 years, which means that normal visual acuity of 1.0 can be achieved at the age of 3 to 5 years. This is the period when amblyopia occurs. This is the period when amblyopia occurs and the best age for amblyopia treatment. If the cause of amblyopia is removed, vision can be redeveloped. This period of treatment is considered by modern medicine to extend into adolescence or later. However, the later it is, the less likely and more difficult it is to cure.