I. What is strabismus? When the oculomotor system is in complete equilibrium, both eyes can become the same functional unit, and when both eyes look at each other, there is no skew, and the object being looked at will be imaged on the macula of both eyes at the same time, which is called orthophoria; if the central control is out of balance and the strength of the extraocular muscles is not balanced, both eyes cannot look at the target at the same time, and the visual axis is separated. If one of the eyes is focused on the target and the other is deviated from the target, it is called strabismus. In daily life, most people use both eyes to gaze at the same time, although the object is imaged separately in both eyes, but the visual center of the cerebral cortex is fused into a single stereo image, this function is called binocular monocular function (divided into simultaneous vision, fusion function and stereo vision three-level function) Once the eye position changes (strabismus), the impact is not only external aesthetics, mainly to bring visual interference, and even the loss of advanced visual The loss of higher visual functions. The neonatal eye is nearly fully developed in terms of gross anatomical structure, but visual development requires a rather long process in which it has to continuously obtain information from the objective world in order to orient itself in the environment and maintain a normal state of adaptation to objective reality. This period is roughly before the age of 8 years in humans. We call this stage the sensitive period of visual development. The critical period of binocular vision occurs rapidly from 6 months to 1 year of age, peaks at 1 to 2 years of age, and then gradually decreases. This is because disturbances in vision during the sensitive period (especially the critical period) will lead to abnormalities in visual development. In turn, any visual developmental disorder can only be cured in this time period and is very ineffective when it is overdue. This is the significance of early diagnosis and early treatment. Second, what are the hazards of strabismus? 1, strabismic amblyopia: because both eyes cannot focus on the same object at the same time, one or two eyes receive two different objects, competing with each other and interfering with each other, when the brain center actively inhibits the visual impulses from the strabismic eye, the visual function of the strabismic eye is inhibited for a long time leading to functional degeneration and the formation of amblyopia. 2, binocular vision dysfunction: because both eyes can not simultaneously look at the same object, resulting in binocular simultaneous visual dysfunction brain central fusion dysfunction three-dimensional visual function decline or loss. 3.Aesthetics, affecting the psychophysiological development of children. Different types of strabismus can be corrected by different methods, which are generally divided into two types: glasses and surgery, and should be mastered by professional doctors. The main purpose of correction is not for aesthetics, but to avoid the loss of visual function or to promote the recovery of visual function, therefore, the best time for treatment should be when strabismus has not yet affected visual function in childhood.