Methods Using square caliper, compass and protractor, 23 heads of adult cadaver specimens were examined including the shape, direction and the thickness of wall of lacrimal sac fossa.

• 方法：利用游标卡尺、圆规、量角器等，对23具（46侧）成人尸头的泪囊窝和鼻泪管各壁的构成、厚度、倾斜角度进行测量。