The fascial sheath of the eyeball (Tenon capsule) is a thin fibrous membrane that wraps the eyeball from the optic nerve to near the cornea, forming a socket in which the eye moves. The extraocular muscle tendons pierce it.
| Location | Around the eyeball inside the orbit, from the optic nerve to the limbus, separated from the sclera by the episcleral (sub-Tenon) space |
|---|---|
| Parts |
|
| Nerve Supply | Ciliary nerves (sensory) |
| Blood Supply | Anterior ciliary arteries; Muscular branches of the ophthalmic artery |
Provides a smooth socket for eye movements and supports the eyeball within the orbital fat.
Local anaesthetic is often injected under it (sub-Tenon block) for cataract surgery. Artificial eye implants after enucleation are placed within it. Inflammation can occur with posterior scleritis.
Inflammation of the back of the sclera and Tenon capsule causing deep eye pain.
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