What is the main function of the lacrimal bone?

The primary function of the lacrimal bone is to contribute to the formation of the eye sockets, specifically helping to make up the medial walls of the orbits. This small, thin bone is located at the inner corner of the eye and plays a crucial role in providing structural support for the surrounding facial bones and the protective eye socket itself. By being part of the orbit's structure, the lacrimal bone also has relevance for tear drainage, as it is associated with the lacrimal sac, which is vital for the tear production and drainage system of the eye.

The other options do not accurately reflect the specific role of the lacrimal bone. While the lacrimal bone is involved in the facial structure, it does not connect all bones or form the lower jaw, nor is its primary role to support the nasal structure. The connections and formations attributed to the lacrimal bone are much more specialized than suggested in those options.