在轻度垂直位斜视,很难决定是上隐斜或上斜视,二者的区别多半在于程度上的不同。交替性上斜视的特征是:(1)当遮盖任何一眼时,该眼即上转,伴同稍向外转和外旋转,不遮盖时即下转,每眼上转的程度可不同,如一眼被遮盖,该眼先 In the mild vertical strabismus, it is difficult to decide on the phoria or on the strabismus, most of the difference between the two lies in the degree of difference. The characteristics of alternating astigmatism are: (1) When covering any one eye, the eye is turned upwards, accompanied by a slight outward rotation and external rotation, which is turned down when not covered, and the extent of each turn can be different, such as one Covered, the eye first