Strabismus, commonly known as strabismus, is a misalignment of the eye. In strabismus, the visual axis of both eyes cannot look at the same target at the same time, only one eye looks at the target, while the other eye’s visual axis is to the side of the target. According to the position of the two eyes, strabismus can be exotropia (commonly known as “oblique white eye”), endotropia (commonly known as “opposite eye”, “cross-eye”), upward strabismus, downward strabismus and so on. There can also be constant strabismus (i.e., strabismus at all times), alternating strabismus in both eyes, intermittent strabismus (sometimes strabismus, sometimes not), etc. Most strabismus sufferers are children, and even adult strabismus patients are mostly affected by the disease in childhood, why? The main reasons are as follows: 1. In children, especially in infancy, the development of binocular vision function is not perfect, and the extraocular muscles that control binocular movements cannot be coordinated well. Before the age of 5, children’s visual function is not yet perfect, which is the high incidence of strabismus. 2, congenital developmental abnormalities, this strabismus is mostly caused by congenital abnormalities of the extraocular muscles or nerve paralysis that governs the movement of the extraocular muscles, or the use of forceps during childbirth that causes injury to the head and face. In some cases, the head and face are damaged by the use of forceps during delivery. In addition, there is a genetic link, and the mode of inheritance has been reported differently, but is generally considered to be polygenic, dominant or recessive. Strabismus generally occurs within 6 months of birth and is called congenital strabismus, which does not have the basic conditions for binocular vision and is the most harmful to visual function. 3, children’s eyes are small, the eye axis is short, most of them are hyperopic, children’s cornea, crystal refractive power and large, ciliary muscle contraction ability, children want to see objects clearly need more adjustment force, at the same time also force to produce excessive convergence, easy to produce internal strabismus, medicine called this internal strabismus “adjustment internal strabismus”. 4, the central control of eye movement in childhood is not enough, that is, if the collection is too strong or adduction is not enough (or both exist at the same time) will produce exotropia. Like a river race, which side is strong, the eye will run towards which side.