Tenon capsule

Tenon's Capsule

Tenon's capsule, also known as the fascia bulbi, is a thin membrane that envelops the eyeball from the optic nerve to the cornea, excluding the corneal region. It is named after French surgeon Jacques Tenon, who first described it in 1805.

Etymology

The term "Tenon's capsule" is derived from the name of French surgeon Jacques Tenon, who first described this anatomical structure in his work "Memoire sur une nouvelle maniere de traiter les cataractes" in 1805.

Anatomy

Tenon's capsule is a thin, clear membrane that envelops the eyeball. It is continuous with the dura mater of the optic nerve and extends forward to the cornea, where it merges with the conjunctiva. The space between the Tenon's capsule and the eyeball is known as the episcleral space, which allows for the free movement of the eye.

Function

The primary function of Tenon's capsule is to provide a smooth surface for the eyeball to move against, facilitating eye movements. It also serves as a barrier, protecting the eye from infection and injury.

Clinical significance

In ophthalmic surgery, Tenon's capsule is often manipulated to access the underlying structures of the eye. For example, in strabismus surgery, the Tenon's capsule is incised to expose the extraocular muscles. In glaucoma surgery, a portion of the Tenon's capsule may be removed to create a new drainage pathway for the aqueous humor.

Related terms

• Fascia bulbi: Another name for Tenon's capsule.
• Episcleral space: The space between the Tenon's capsule and the eyeball.
• Strabismus surgery: A type of eye surgery that often involves manipulation of the Tenon's capsule.
• Glaucoma surgery: A type of eye surgery that may involve removal of a portion of the Tenon's capsule.

Tenon capsule Resources
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