先天性上睑下垂纠正一侧时往往会出现对侧上睑缘位置不同程度下移 ,使原有术前近似正常的对侧上睑造成不同程度下移 ,从而影响外观 ,往往造成术前估计不足。对侧上睑位置的纠正 ,又会反过来影响患侧已纠正的上睑位置。如何判断及预测上睑下垂纠正后双侧上睑缘位置 ,是手术满意 Congenital blepharoptosis when correcting one side often appear on the contralateral palpebral margin down to varying degrees, the original preoperative similar to the normal contralateral upper eyelid caused by varying degrees of down, thus affecting the appearance, often resulting in preoperative estimates insufficient. Correction of the position of the contralateral upper eyelid, in turn, will affect the position of the affected upper eyelid corrected. How to judge and predict the location of bilateral upper eyelid margin after correction of ptosis is satisfactory