Fig. 6.

Schematic diagram for the formation of a tension band in the early compressional stage. Point S: It is point of the highest sheer stress. Point P: It is the inferior end of the tension band (lateral end of preseptal orbicularis muscle origin on the medial canthal ligament) and acts as a pulling-up tether, like setting up a tent pole, during contraction of the orbicularis muscle. The medial canthal ligament can be elongated and displaced consequently by a repeated traction mechanism.