The prevalence of strabismus in children is 1 to 3 percent, and strabismus is a very common clinical ophthalmology disease, second only to myopia in children, but many parents have limited knowledge of this disease and are not aware of the dangers of strabismus, missing the best time for treatment and delaying the child’s life. There are many types of strabismus, one is intermittent strabismus, which is sometimes strabismus during the day, but the rest of the day is the same as normal eyes, which parents may find only if they are careful, and the other is constant strabismus, which is strabismus at all times of the day, which is easy for parents to find. Here we introduce several methods to identify strabismus: I. Corneal light reflection method Tools: flashlight or camera. Method: Turn on the flashlight or camera and ask the child to look at the light source. Judge the child’s eye position according to the light spot in the child’s eyes. The following diagram: Figure 1 normal eye position, both eyes corneal reflection point in the pupil Figure 2 internal strabismus, the left eye corneal reflection point in the pupil outside Figure 3 exotropia, the left eye corneal reflection point in the pupil inside Two, there is a special strabismus can cause the patient to tilt the head to see things, this phenomenon is called the strabismus, the most common is ophthalmic strabismus, this time do not prevent cover the child’s one eye, if the child’s strabismus disappeared, at this time If the child’s squint disappears, then ophthalmic squint is highly suspected and the child should be taken to the ophthalmology department in time for examination. Third, if the child appears photophobic and likes to squint in the sun, this should be alerted to the presence of intermittent exotropia, a common symptom of intermittent exotropia is photophobia, as the light stimulates the retina and destroys the fusion, the patient may be trying to avoid diplopia, or affect the fusion set amplitude, so that the patient actively closes the eyes. If a child is found to have these symptoms, should he or she be operated as soon as possible? Actually, no, children with strabismus should be detected early and diagnosed early and treated early. It is correct to take the child for early examination, but the specific treatment, whether surgery or conservative treatment, depends on the examination results, because not all strabismus requires surgical treatment.