Lacrimal nerve

Lacrimal Nerve

The lacrimal nerve and its branches. (Lacrimal nerve labeled at upper right.)

The Lacrimal Nerve is the smallest branch of the Ophthalmic Nerve, itself a branch of the Trigeminal Nerve. It is responsible for supplying sensory innervation to the lacrimal gland, eyelid, and conjunctiva.

Anatomy

The lacrimal nerve is the first branch of the ophthalmic nerve and runs along the upper border of the lateral rectus muscle. It provides sensory innervation to the lateral upper eyelid and conjunctiva. It also carries parasympathetic fibers from the Pterygopalatine Ganglion to the lacrimal gland.

Function

The lacrimal nerve carries sensory fibers from the lateral parts of the upper eyelid and conjunctiva. It also carries parasympathetic secretomotor fibers to the lacrimal gland, which are responsible for tear production.

Clinical Significance

Damage to the lacrimal nerve can result in decreased tear production, leading to dry eye syndrome. This can cause discomfort, blurred vision, and increased risk of eye infections.

See Also

• Ophthalmic Nerve
• Trigeminal Nerve
• Lacrimal Gland
• Pterygopalatine Ganglion