The lacrimal bone is the smallest facial bone, forming part of the medial orbital wall and containing the lacrimal groove through which the nasolacrimal duct passes to drain tears.
The lacrimal bone is the smallest and most fragile bone in the face, forming the medial orbital wall and housing the nasolacrimal canal. Medial orbital wall blowout fractures involve the lacrimal bone and the thin orbital plate of the ethmoid (lamina papyracea), producing enophthalmos and medial gaze restriction.
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