After the fusion mechanism of both eyes is removed, a deviation in eye position is found, and this phenomenon is called strabismus. This phenomenon is called strabismus. It includes both occult strabismus and dominant strabismus. Clinically, occluded strabismus is more common, such as internal strabismus, which may cause visual fatigue, eye pain, red eyes and headache after excessive eye use, but after rest, the symptoms can improve or even disappear; sometimes diplopia may also occur. According to the pathogenesis, strabismus is divided into common strabismus and non-common strabismus. Common strabismus may be related to regulation and refraction, so many patients may also have some refractive error. In the case of children, there is a possibility of amblyopia, which usually requires dilated medical optometry in the hospital, followed by correction of refractive error, amblyopia treatment, and then consideration of surgery. Non-common strabismus, including restrictive strabismus and paralytic strabismus, presents with symptoms that, in addition to the manifestations of the primary disease, may also reveal a compensatory head position, asymmetry of the cheek muscles on both sides, and significant diplopia. Therefore, if a patient is found to have strabismus, it is best to go to the hospital for a routine examination to clarify the cause and then treat it in a timely manner.