Amblyopia means that the vision cannot reach normal vision, even with glasses, and the optic nerve is not fully developed. Amblyopia is a developmental eye disease with no obvious organic lesions in the eye, and is a common ophthalmology clinical eye disease in children. The most common causes are strabismus, refractive error, high refractive error, and other factors that prevent one or both eyes from receiving normal visual stimulation and cause optic nerve developmental disorders. The outcome of treatment is closely related to age, and the younger the age, the better the treatment outcome. Early correction of refractive error and amblyopia training are needed. In addition, we should pay attention to go to the hospital ophthalmology to do optometry examination, wear qualified glasses, and then use amblyopia training to correct amblyopia, which requires long-term treatment. In summary, amblyopia in children is a visual development disorder eye disease that should be detected early and intervene as early as possible, including correction of vision as well as related training, which is expected to restore some of the vision.