上睑退缩是指由于各种原因导致上喻缘超过正常界限,位于或高于上方角膜缘,在双眼平视前方时睑裂增宽、角膜上方暴露出部分白色巩膜,当眼球向下注视时,上睑不能随眼球向下转动而下移的异常状态。眼睑一旦发生退缩,由于睑裂明显增大、临床上呈现出眼球突出样外观.不但影响美容,而且容易并发角膜病变。因此治疗和矫正眼睑退缩,不但对恢复眼睑功能和保护角膜有重要 Upper eyelid retraction is due to various reasons, the Yu Yu edge beyond the normal boundaries, at or above the upper limbus, palmarus longus in front of both eyes widened when exposed above the cornea, part of the white sclera exposed when the eye down, The upper eyelid can not rotate downward with the eye and down the abnormal state. Eyelid in the event of withdrawal, as palpebral fissure significantly increased clinically showing the appearance of prominent eyeballs not only affect the beauty, but also easy to corneal lesions. Therefore, the treatment and correction of eyelid withdrawal, not only to restore eyelid function and protect the cornea is important