The determination of the degree of strabismus can only be clarified after a detailed strabismus examination, which includes the following methods: the first is the corneal reflectance method, which is a relatively simple but less accurate method, but more practical and convenient; the second is the trigeminal examination, which can accurately determine the degree of strabismus; the third is the synoptic machine examination, which is relatively more accurate, but It is more complicated to check. Through these methods, we can accurately determine the presence of strabismus, the type of strabismus, and the degree of strabismus, and then develop an accurate treatment plan, some can be corrected by wearing glasses, while some must be corrected by surgery, and the timing of surgery also depends on the specific condition. After strabismus appears, it is important to go to the hospital for a detailed examination.