Since the prevalence rate of children with strabismus is as high as 3-4%, ophthalmologists have to caution parents to beware of their children suffering from strabismus. Amblyopia is more frightening than myopia. The danger of amblyopia and strabismus is not only low vision, but more importantly, the inability to establish perfect binocular monovision. In other words, there is no stereo vision. For example, the average person sees objects in three dimensions, but these strabismus patients see like a two-dimensional plane and have no precise sense of stair height, water depth, etc. This not only hurts the child’s eyes and brings inconvenience to the child’s daily life, but also adversely affects the child’s future education, employment and career choice.