Optic nerves

Optic Nerves

The optic nerves are paired cranial nerves that transmit visual information from the retina to the brain. They are considered part of the central nervous system and are derived from the diencephalon during embryonic development.

Anatomy

Each optic nerve is approximately 50 mm in length and is divided into four parts: the intraocular, intraorbital, intracanalicular, and intracranial parts. The optic nerve is surrounded by a sheath of meninges, which contains cerebrospinal fluid.

Function

The primary function of the optic nerves is the transmission of visual information from the retina to the brain. This information is processed in the visual cortex of the brain, allowing us to perceive and interpret the visual world.

Clinical significance

Damage to the optic nerves can result in visual disturbances or loss of vision. Conditions that can affect the optic nerves include glaucoma, optic neuritis, and optic nerve glioma.

See also

• Visual system
• Cranial nerves
• Neuroanatomy

References

Optic nerves Resources
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