It gives origin to the lacrimal part of the orbicularis oculi muscle.

The inner margin of it unites with the frontal process of the maxilla to complete the fossa for the lacrimal sac.

[1] In most people, the posterior lacrimal crest is fairly prominent.

[3] The posterior lacrimal crest may be vulnerable to avulsion fractures.

[7] This article incorporates text in the public domain from page 164 of the 20th edition of Gray's Anatomy (1918)