To prevent parents from missing the treatment time of strabismus for their children and to make it easier and faster for parents to detect strabismus in their children, we would like to introduce an easy-to-learn method for you to detect strabismus at an early stage, which is to use a flashlight at home to give your child an ortho-ocular irradiation, when the child’s two eyes are looking straight ahead or looking at the flashlight light source, there is a bright spot on each of the child’s two corneas (on the black eye) If the bright spot is in the middle of the two black eyes, the parent can determine that the child does not have strabismus. If the bright spot is not in the middle of the eye, the child should be taken to the ophthalmology department or strabismus specialist at the earliest possible time, and the doctor will determine whether the child has strabismus or pseudostrabismus based on the child’s condition.