What is the lateral canthus of the eye?

What is the lateral canthus of the eye?

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. It is here that bilirubin accumulates to stain the superficial sclera yellow (“icterus”).

What is the function of the lateral canthus?

Our data support the concept that the lateral canthal tendon stretches with advancing age and allows the lateral canthus to drift medially, thus allowing for shortening of the horizontal palpebral fissure and contributing to the marked laxity of the lower eyelids often seen in older individuals.

Where does the lateral canthus attach?

Whitnall’s tubercle
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 are the medial canthus and lateral canthus?

Conclusions: The medial canthus and the lateral canthus are dynamic structures that move with horizontal eye movements in patients who have not undergone canthoplasty.

Where is your canthus located?

The 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 lateral canthal area?

ANATOMY OF THE LATERAL CANTHAL AREA The SLPL extends from the lateral ends of tarsal plate to the periosteum of lateral orbital rim. The DLPL extends from the lateral ends of tarsal plate deep into the origin of the SLPL to Whitnall’s tubercle on the zygomatic bone inside the orbital margin.

Is lateral canthus upper or lower eyelid?

Applied Facial Anatomy The shape of the lower eyelid is determined by the attachment of the medial and lateral canthal tendons as well as the tone and contraction of the OOM. The lateral canthal angle is usually positioned 1 to 2 mm above the medial canthal angle.

What is outer canthus?

Why is my lateral canthus red?

This is caused by the Moraxella organism or staph. “In this, the lateral canthal angle will be involved, with the redness, scaling and irritation all pointing to that area as a source of discomfort or pain,” says Dr. Harris. “You may actually find Moraxella in the makeup the patient may be reusing.

What is the function of medial canthus?

The main goal of restoration of the medial canthus is to retain normal eyelid function, support the lacrimal drainage system, and protect the globe.

Why is the outside corner of my eye hurting?

Pain that’s localized to the corner of your eye can have several potential causes. Possible causes can include tear duct infections, blepharitis, and styes. Some of the conditions that affect the corner of your eye may be treated at home using warm compresses, gentle massage, or artificial tears.

Why is the outer corner of my eye swollen?

Inflammation (due to allergy, infection, or injury), infection and trauma can all cause swelling of the eyelids. In come cases swelling of the eyelid may be the only symptom, but in others the eyelid is also likely to be red, itchy, gritty or sore.

What is lateral canthal tendon?

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.

What is angular blepharitis?

Angular blepharitis is inflammation of the eyelid skin at the lateral canthus, most commonly caused by Staphylococcus and Moraxella species. The Demodex mite is an external parasite that often infests the human eyelid margin and has been implicated in both anterior and posterior blepharitis.

How does a lateral Canthotomy work?

Relevant Anatomy for Lateral Canthotomy 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 does Blepharoconjunctivitis look like?

If the underlying blepharitis is anterior in origin, the eyelid margin will appear edematous. The eyelid margin will be erythematous, and telangiectasia may be seen. There may be crusting on the eyelid margin with the formation of collarettes at the base of the lashes.

Why is the outer corner of my eye sore?

Possible causes can include tear duct infections, blepharitis, and styes. Some of the conditions that affect the corner of your eye may be treated at home using warm compresses, gentle massage, or artificial tears. However, other conditions may need to be treated with antibiotics or steroid eye drops.