Wearing a small pair of glasses with a blue eye patch is the classic image of a child with amblyopia. Wearing a pair of glasses at a young age is already quite inconvenient, and adding an eye patch can be a real annoyance to children. Many children refuse to wear an eye patch, or remove it secretly at school, which affects the effectiveness of amblyopia treatment. For children who are unable to adhere to the masked eye patch, physicians use the method of dilating the pupil with a dab of atropine in the healthy eye to medically depress the vision in the healthy eye. This method does not quantify the extent to which the vision of the healthy eye is affected, and the use of atropine for pupil dilatation can cause photophobia in the healthy eye, causing significant symptoms of discomfort for the child. An alternative to the unsightly eye patch is now available in the form of a translucent film called a suppression film, which is applied to the lens. This suppressive film is available in different densities and can be applied to the lenses of eyes with normal vision to quantitatively reduce vision to below 1.0 to 0.1. Compared to the traditional masking method for amblyopia, the suppression film has some advantages: First, it is aesthetically pleasing. Fear of being teased by classmates with a masking eye patch is the main reason why children are reluctant to cover up. The appearance of the glasses remains almost unchanged when this translucent suppression film is attached, but the child cannot see clear objects through the lens, achieving the purpose of masking. Secondly, it can quantitatively suppress the vision of the healthy eye to one or two lines below the visual mark of the amblyopic eye. When the healthy eye is completely covered, although it can achieve the purpose of stimulating the amblyopic eye, it cannot exercise the child’s binocular vision function. In contrast, the use of suppression film, during the treatment process, the healthy eye and the amblyopic eye receive the imaging of external objects at the same time, although the object is not clear enough, it is important for the establishment of simultaneous binocular vision and stereopsis function. It also prevents the occluded amblyopic eye from developing masked amblyopia during the treatment process. Third, it improves the visual quality of the child during amblyopia treatment. If the healthy eye is completely blocked with traditional eye shields, it is inconvenient for the child to learn and live with only the amblyopic eye, which is an important reason for the failure of masking treatment. Using a suppression film allows the healthy eye to see blurred objects at the same time, reducing the discomfort of simple masking. And as the visual acuity of the amblyopic eye improves, the suppression film can be replaced with a less dense one, improving the quality of the child’s vision. Suppression film is a more scientific method of treating amblyopia. It is suitable for moderate amblyopia in one eye with a visual acuity of 0.3 or higher, and not only improves the visual acuity of the amblyopic eye significantly, but also effectively protects the visual function of both eyes of the child. At present, it has achieved good treatment effect in clinical application.