Medial Canthus Anatomy

Touching the medial canthus of the eye evaluates the ophthalmic branch. The structure of the palpebral fissure is maintained by the tarsal plates suspended by the medial and lateral canthal tendons fig.

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Laterally it is attached to the tarsus of the upper and lower eyelids.

Medial canthus anatomy. The eyelids the nose is the inner canthus and the other is the outer canthus. The medial palpebral ligament medial canthal tendon mct is a fibrous band stabilizing the medial tarsi and is intricately related with the orbicularis oculi muscle and the lacrimal system. Canthi palpebral commissures is either corner of the eye where the upper and lower eyelids meet.

The lower lid rests at the inferior limbus and peaks 1 mm lateral to the center of the pupil. Used to correct deformities caused by trauma disease or prior surgery. Touching the lateral canthus of the eye evaluates the maxillary branch.

1 the skin containing glands that open onto the surface of the lid margin and the eyelashes. Both of these have a unique angle at which the upper and lower eyelids meet. The superficial head of the pretarsal orbicularis muscle lies anterior to the canaliculi and forms the anterior limb of the mct.

It is 3 mm lower in asians. The bicanthal plane is the transversal plane linking both canthi and defines the upper boundary of the midface. Pinching the skin on the lower lip tests the mandibular branch.

May also provide additional support to the lower eyelid by moving or tightening connections from the tarsal plate to the orbital rim. 2 a muscular layer containing principally the orbicularis oculi muscle responsible for. The upper and lower eyelids along with the upper and lower puncta oppose the globe.

Any of several procedures for changing the configuration or position of the lateral canthus. The medial palpebral ligament medial canthal tendon is about 4 mm in length and 2 mm in breadth. The medial canthal tendon is formed by the merging of two tendinous arms originating from the anterior and posterior lacrimal crests.

The lid may be divided into four layers. A 75 year old male retired personnel presented with complaints of swelling at medial canthus of the left eye of one year duration associated with pain ocular discharge redness and watering. Areas to be considered for full thickness grafts include the nasal ala the medial canthus of the eye the upper eyelid fingers and the ear.

When examined along a horizontal plane the medial canthal angle is located around 2 mm lower than the lateral canthal angle in caucasians. The one on the inner aspect is called the medial canthus while that at the outer aspect is called the lateral canthus. More specifically the inner and outer canthi are respectively the medial and lateral endsangles of the palpebral fissure.

The upper lid naturally rests 1 to 2 mm below the superior limbus and peaks 1 mm medial to the center of the pupil. Its anterior attachment is to the frontal process of the maxilla in front of the lacrimal groove and its posterior attachment is the lacrimal bone.

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