Amblyopia treatment is a long and arduous process, and once a child has amblyopia, parents need to be prepared for a long-term battle. There are many common treatments for amblyopia, including glasses, masking, suppression therapy, functional training, and multimedia visual function training. Among the various conventional treatments for amblyopia, masking therapy is the most important, cost-effective and long-standing method, which has been clinically used for more than 200 years and its therapeutic effects have been confirmed by numerous studies and clinical practices. Masking therapy is mainly used for children with strabismus, refractive error, and amblyopia with a difference in visual acuity of more than 2 lines between the eyes. By temporarily suppressing the dominant eye (healthy eye, dominant eye, or dominant eye) and giving the amblyopic eye the opportunity to use it with appropriate benign visual stimulation, the masking reduces or eliminates the long-standing inhibition of the amblyopic eye by the dominant eye, allowing it to become excited again, thereby improving visual acuity. By covering, it also helps to adjust and establish normal retinal correspondence between the two eyes and gradually restore monocular function in both eyes. The masking method can be broadly divided into three categories according to the situation of the child’s amblyopic eye. This method is suitable for children with refractive amblyopia and strabismic amblyopia. These children often have good vision in one eye and poor vision in the other eye. A black cloth eye patch is used to cover the eye with good vision and force the child to use the other eye with poor vision, so that the poor eye is exercised and the inhibition is gradually removed and the vision of the poor eye is improved. For children under 3 years of age, the cover can be released for one day after 3 consecutive days; for children over 3 years of age, the cover can be released for one day after 3-5 consecutive days. During the treatment process, the child should be observed for changes in the visual acuity of the amblyopic eye, and the visual acuity should be reviewed once every half month. At the same time, the visual acuity of the healthy eye should be observed in order to prevent vision loss caused by masking. This method is suitable for children whose visual acuity in the amblyopic eye has risen above 0.7. The semi-covering method is to use translucent plastic film to cover the normal eye so that the vision of the normal eye is artificially lower than that of the amblyopic eye. This allows the amblyopic eye to have more opportunities to gaze, and is also conducive to the establishment and improvement of binocular visual function. This method is suitable for children whose visual acuity in the amblyopic eye has returned to normal, but is still lower than that of the normal eye. For example, if the visual acuity of the normal eye is 1.5 and the visual acuity of the amblyopic eye is 1.2, you can cover the normal eye and use the amblyopic eye when doing homework in order to consolidate the treatment effect. In contrast, no masking is needed during normal times. This traditional treatment for children with amblyopia may seem simple, but it is not. Since the children treated for amblyopia are usually younger children, these children are at this stage of kindergarten or elementary school. When one eye is always covered, the child keeps using one eye to see and lacks a sense of depth, which, combined with the young age and lack of life experience, adds to the inconvenience of the child’s daily life and is therefore difficult for the child to accept. Some children find it unattractive and are afraid of being teased by their classmates and other children, which causes psychological pressure on the otherwise carefree child, who often secretly removes the blindfold when going out, affecting the treatment effect. Therefore, it is necessary for parents to first do psychological counseling for their children and for school teachers to cooperate and coordinate the relationship between the treated amblyopic child and other children. Reduce the child’s psychological pressure to adhere to the masking.