In the operation of moderate or advanced congenital single blepharoptosis, we found that the opposite upper lid position often appeared slightly ptotic or the original ptosis worsened.

• 在手术治疗单侧中、重度先天性上睑下垂时发现，按原拟定方案对其对侧实施手术常出现轻度下垂或原有的轻度上睑下垂加重。