一、成因间歇性外斜视(Intermittent exotr-opia)占外斜视中的大多数(80%)。其发病成因的说法甚多,其中以辐辏功能松驰及融合力低下为可信。先天性水平机不平衡,融合能力低下为间歇性外斜视成因的基础。融合能力为于生后逐渐发育起来的视机能。人的两眼眼眶轴约呈45°开散位,而眼位经常处于平行状态,这除受两眼球周围解剖因 First, the causes of intermittent exotropia (Intermittent exotr-opia) accounted for the majority of exotropia (80%). There are many causes of its morbidity, of which the function of relaxation and convergence of low convergence is credible. Congenital level machine imbalance, low fusion capacity is the basis for the causes of intermittent exotropia. The ability of fusion to develop gradually after birth as a visual function. Eyes of the human eye orbital axis about 45 ° open up, and often in parallel eye position, which is divided by the anatomy of the two around the eye