The medial and lateral canthal ligaments contain the eye within the orbit and eyelids. The lateral canthal tendon has two branches: a superior and an inferior. Cutting one, or both, loosens the eyelids and allows the globe to expand out of the orbit and thus relieve pressure on the eye.
What is the point of insertion of the lateral canthal tendon?
Histologic examination of hematoxylin-eosin-stained slides showed that the fibers of the lateral canthus inserted into the periosteum but not beyond it. Conclusions: The lateral canthal tendon attaches the upper and lower tarsal plates to Whitnall’s tubercle inside the orbital rim deep to the septum.
What is right lateral canthus?
Lateral canthus: the lateral confluence of upper and lower eyelid margins. Sclera: the collagenous outer wall of the eyeball. Its outermost portion, called the episclera, has a rich vascular network.
What is a lateral tarsal strip procedure?
GENERAL CONSIDERATIONS: The lateral tarsal strip procedure has the combined effect of increasing horizontal lid tension and adjusting the level of the lateral canthus. The technique involves a lateral canthotomy and transection of a portion of the lateral canthal tendon (cantholysis).
Where is the right lateral canthus?
The lateral angle or corner of the eye where the upper and lower eyelids meet.
Where is the lateral canthal tendon?
orbital osseous tubercle
The lateral canthal tendon is attached to the inner aspect of the frontozygomatic process on the orbital osseous tubercle and is essential to the structural fixation of the lateral canthus as well as a check on the mobility of the lateral canthal angle of the eye itself.
Which is the most commonly performed procedure to repair ectropion?
A canthoplasty, or lateral tarsal strip is a commonly performed eyelid surgery used to repair ectropion. These procedures involve repairing and reattaching the tendons and tissues on outer corner of the lower eyelid.
Where is outer canthus?
Canthus (pl. canthi, palpebral commissures) is either corner of the eye where the upper and lower eyelids meet. More specifically, the inner and outer canthi are, respectively, the medial and lateral ends/angles of the palpebral fissure.
What is a lateral strip?
• A lateral tarsal strip is a procedure to tighten the lower eyelid and to prevent. the eyelid turning out (Ectropion) or rolling in on the eye (Entropion). It is also. sometimes used to treat watering symptoms.
How is ectropion surgery performed?
Your surgeon will likely remove a small part of your lower eyelid at the outer edge. When the lid is stitched back together, the tendons and muscles of the lid will be tightened, causing the lid to rest properly on the eye. This procedure is generally relatively simple.
What happens when you cut the lateral canthal tendon?
Relevant Anatomy. The lateral canthal tendon has two branches: a superior and an inferior. Cutting one, or both, loosens the eyelids and allows the globe to expand out of the orbit and thus relieve pressure on the eye.
Where does the lateral canthal tendon attach to the orbital rim?
Conclusions: The lateral canthal tendon attaches the upper and lower tarsal plates to Whitnall’s tubercle inside the orbital rim deep to the septum.
How do I perform cantholysis of the lateral canthal?
Lift the lateral portion of the inferior eyelid to expose the lateral canthal tendon. To perform cantholysis, identify and cut the inferior crus of the lateral canthal ligament. Ensure that your scissors are pointing away from the globe during the incision. Identifying the inferior crus of the lateral canthal tendon can sometimes be tricky.
What is lateral canthopexy?
Lateral canthopexy has become a routine part of cosmetic lower blepharoplasty to prevent lower lid malposition, especially in those patients with laxity of the lower lid and negative vector anatomy. 1 All canthopexy techniques involve securing the lateral retinaculum to the periosteum of the superolateral orbital rim with a suture.
