Tags: Anatomical Structure, Nerve.
The lacrimal nerve is the smallest of the three branches of the ophthalmic division of the trigeminal nerve. It sometimes receives a filament from the trochlear nerve but this is possibly derived from the branch that goes from the ophthalmic to the trochlear nerve. It passes forward in a separate tube of dura mater and enters the orbit through the narrowest part of the superior orbital fissure.
