Revision 9 for 'Lacrimal sac'All Revisions
The lacrimal sac lies in the lacrimal fossa on the inferomedial aspect of the orbit between the posterior and anterior lacrimal crests. The lacrimal sac has a superior fundus that tapers inferiorly to a slimmer body. It drains via the valve of Krause into the nasolacrimal duct. It is enclosed by the lacrimal fascia and the orbicularis oculi muscle.