Optic canal

The Optic Canal is a cylindrical canal running obliquely through the lesser wing of the sphenoid bone to connect the orbit and the middle cranial fossa. It transmits the optic nerve and the ophthalmic artery.

Etymology

The term "Optic Canal" is derived from the Latin word "Opticus" meaning "of sight" and the Latin word "Canalis" meaning "channel".

Anatomy

The Optic Canal is located in the sphenoid bone, at the back of the orbit. It is approximately 1 cm long and begins at the apex of the orbit. The canal is directed backward and medially, and slightly upward. It is slightly constricted in the middle and is broader at each end.

Function

The primary function of the Optic Canal is to provide a pathway for the optic nerve and the ophthalmic artery. The optic nerve, which is responsible for transmitting visual information from the retina to the brain, passes through the Optic Canal. The ophthalmic artery, which supplies blood to the retina and other structures in the eye, also passes through the Optic Canal.

Clinical Significance

Any damage or obstruction to the Optic Canal can lead to vision problems. For example, a fracture in the sphenoid bone can cause damage to the optic nerve, leading to vision loss. Similarly, a tumor or aneurysm in the area can compress the optic nerve or ophthalmic artery, leading to vision problems.

Related Terms

• Sphenoid bone
• Orbit
• Middle cranial fossa
• Optic nerve
• Ophthalmic artery

See Also

• Human eye
• Visual system
• Cranial nerves

Optic_canal

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  Human orbit anatomy
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  Diagram of the orbit
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  Bones of the orbit
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  Anatomy of the eye and orbit
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  Lateral view of the orbit
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  Optic nerve and surrounding structures
• Optic canal
  Optic canal