The condition in which one eye is high and one eye is low is usually a sign of vertical strabismus, which is also a relatively common type of strabismus. Most of the causes of this condition are due to congenital dysplasia of the extraocular muscles. If the condition is acquired, it is usually considered to be related to orbital diseases, such as orbital occupational diseases, orbital trauma, nerve palsy, etc. After this condition occurs, it is usually necessary to go to the hospital for a detailed examination. The treatment for this condition is mainly surgical correction, because vertical strabismus can easily cause double vision and deformation, so it can seriously affect normal life. By artificially changing the starting and ending points of the extraocular muscles through surgery, the eye position can be readjusted to normal by this method, so as to improve the performance of diplopia.