Children with strabismus should be treated as early as possible once it is detected, and the earlier the onset, the earlier the treatment should be. For example, congenital internal strabismus, which usually develops within the first six months of life, is a type of strabismus that seriously affects the development of a child’s visual function and should be corrected as early as possible. When a child with strabismus arrives at the hospital, regardless of his or her visual acuity, the doctor will first check the child’s visual acuity, that is, to determine whether the child has farsightedness, myopia, astigmatism, or combined amblyopia. Generally, a dilated eye exam is done to make the eyes lose their ability to adjust so that the measured refraction is true. If the child has refractive abnormalities, the refractive abnormalities should be corrected first and appropriate glasses should be put on. If the strabismus is combined with amblyopia, the amblyopia should also be treated first. If the vision is good with glasses, but the strabismus is still present, it is still important to operate in time to correct the skewed eye position to the best condition. This will help restore the child’s binocular vision and fine stereo vision.