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a branch of the ophthalmic nerve [CN V1] in the superior orbital fissure, passing through the orbit, giving rise to the communicating branch to the ciliary ganglion, the long ciliary nerves, the posterior and anterior ethmoidal nerves, and terminating as the infratrochlear and nasal branches, which supply the mucous membrane of the nose, the skin of the tip of the nose, and the conjunctiva.
Any of the medial, lateral, and external nasal nerves that are sensory branches of the nasociliary nerve. They enter the top of the nasal cavities and innervate the internal walls of the nose.
See also: nerve