Strabismus is a very common clinical eye disorder that can occur in people of all ages, but is mostly seen in adolescents or children. The exact cause of strabismus is not well understood. The exact cause of strabismus is not well understood and may be related to neurological factors, anatomical factors such as muscles, and psychological factors. For example, common internal strabismus, common external strabismus, etc. Some of the causes of strabismus are acquired, such as traumatic lesions of the eye, which can injure the muscles of the eye and the nerves of the eye, causing a skewed eye position. There are also medical factors, such as injuries to the muscles and nerves of the eye during eye surgery, that can cause strabismus, most commonly during pterygium surgery. Some occupying lesions in the eye or in the skull can also cause strabismus by compressing the nerves in the skull and eye. In summary, the causes of strabismus are mainly congenital and acquired factors, among which trauma, ocular lesions and intracranial lesions are common causes. It is very helpful to clarify the causes of strabismus for our next treatment.