Long ciliary nerves

Long ciliary nerves are a pair of nerves that originate from the ciliary ganglion, an anatomical structure located in the orbit (eye socket). The term "long ciliary nerves" is derived from the Latin words "longus" meaning long, and "cilia" meaning eyelash, referring to the nerves' long, thin appearance and their location near the eye.

Anatomy

The long ciliary nerves are a pair of sensory nerves that originate from the ciliary ganglion, a parasympathetic ganglion located in the posterior part of the orbit. They travel forward in the orbit, passing between the sclera (the white outer layer of the eye) and the choroid (the vascular layer of the eye), to reach the cornea and iris.

Function

The long ciliary nerves carry sensory information from the cornea and iris to the brain. They also carry sympathetic fibers that control the dilation of the pupil.

Clinical significance

Damage to the long ciliary nerves can result in loss of corneal sensation, which can lead to corneal ulcers and other eye problems. They can also be affected in conditions such as herpes zoster ophthalmicus, a viral infection of the eye.

See also

• Short ciliary nerves
• Nasociliary nerve
• Ophthalmic nerve

References

Long ciliary nerves Resources
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