What is the tenon of the eye?
Tenon’s capsule is a thin fascial sheath that surrounds the eyeball, separating it from the orbital fat. The inner surface of the capsule is smooth and shiny. A potential space, the episcleral (sub-Tenon’s) space, separates the capsule from the outer surface of the sclera.
What is the function of Tenon’s capsule?
The Tenon capsule, also known as fascia bulbi or bulbar sheath, functions as an extraocular muscle pulley. It also provides a socket which separates the globe from the surrounding fat and allows free movement.
What occupies the space between the sclera and Tenon’s capsule and what is its functional significance?
This lymph space is continuous with the subdural and subarachnoid cavities and is traversed by delicate bands of connective tissue which extend between the capsule and the sclera….
| Tenon’s capsule | |
|---|---|
| MeSH | D058475 |
| Anatomical terminology |
What is fascia bulbi?
The Tenon capsule (fascia bulbi) is an envelope of elastic connective tissue that fuses posteriorly with the optic nerve sheath and anteriorly with a thin layer of tissue, the intermuscular septum, located 3 mm posterior to the limbus.
What is eye equator?
Description. The equator of the eyeball is the virtual line corresponding to the greatest circumference of the eyeball equidistant between the anterior and posterior poles.
Who was tenon?
Jacques-René Tenon (French pronunciation: [ʒakʁne tənɔ̃], 21 February 1724 – 16 January 1816) was a French surgeon born near the town of Joigny….
| Jacques-René Tenon | |
|---|---|
| Nationality | France |
| Known for | capsule of Tenon, Hôpital Tenon. |
| Scientific career | |
| Fields | surgery |
What part of the eye prevents the eyeball from collapsing?
Gel-like fluids inside the eye help it maintain its shape, which plays an important role in overall eye health. These substances are called the vitreous humor and aqueous humor.
What is Lockwood’s ligament?
Lockwood’s ligament supports the position of the globe in its position within the orbit, preventing any displacement. The globe is also supported by the medial and lateral check ligaments, septum, and adipose tissue. The course of the ligament determines the shape of the lower conjunctival fornix.
What triggers episcleritis?
There is no apparent cause, but it can be associated with an underlying systemic inflammatory or rheumatologic condition such as rosacea, lupus or rheumatoid arthritis. Typical symptoms include generalized or local redness of the eyes that may be accompanied by mild soreness or discomfort but no visual problems.
What are the 4 muscles of the eye?
The human eye has six eye muscles. They are split into two primary groups: the recti muscles and the oblique muscles. The four recti muscles are the lateral rectus, the medial rectus, the inferior rectus, and the superior rectus while the two oblique muscles are the inferior oblique and the superior oblique.
Where is lamina Cribrosa located?
The lamina cribrosa forms the bottom of the optic cup on the inner surface of the optic nerve head. On the outer surface of the optic nerve head, the posterior part of the lamina cribrosa faces the anterior region of the optic nerve.