先天性上睑下垂是小儿常见的先天性眼病,大多数是由于上睑提肌发育不全,或支配它的运动神经即动眼神经发育异常、功能不全所致。不仅影响容貌,而且影响患儿的视力发育,尤其是中、重度上睑下垂,由于上睑部分或全部遮住了视轴,为使视轴摆脱下垂上睑的干扰,患儿常需抬颌仰视,久之即导致额部皱纹增多增深,眉毛上抬,以及不良的仰头习 Congenital ptosis is a common congenital eye disease in children, mostly due to levator muscle aplasia, or to dominate its motor nerve that is abnormal oculomotor nerve dysfunction caused by. Not only affect the appearance, but also affect the children’s visual acuity, especially in severe ptosis, due to the upper eyelid partially or completely cover the visual axis, in order to make the visual axis to avoid the interference of sagging eyelids, children often need to raise jaw Looking up, a long time that leads to an increase in forehead wrinkles, eyebrows lift, and poor head learning