Generally, the canthus surgery we talk about refers to the inner canthus, and rarely involves the outer canthus. So what's the difference between opening an inner corner and an outer corner?

First of all, talk about the organizational differences between inner canthus and outer canthus.

In the operation of opening the inner corner of the eye, in addition to the epicanthus we often discuss, some tissues of the lacrimal passage will also be involved:

Inner corner of the eye: There is a red triangle-tear mound at the apex of the inner corner of the eye, and there is a protruding hole on the edge of the upper and lower eyelids, which is similar to a crater-upper and lower tear points. When you close your eyes, the upper and lower tears are just the same. The lacrimal gland produces and secretes tears into the eyes, and then enters the upper and lower lacrimal canaliculus through the upper and lower lacrimal punctum. The joint of the upper and lower lacrimal canaliculus is the apex of the inner corner of the eye, which is easily indestructible.

So generally speaking, the operation of opening the inner canthus is not really cutting the inner canthus tissue. Instead, by treating the epicanthus of the canthus, the covered inner canthus is exposed, thus increasing the crack of the eye and expanding the eyes.

Outer canthus: Xiamen Meilai experts introduced that the outer canthus has a special structure and no vegetation. The upper and lower tarsus meet and extend to form the lateral canthus ligament, and the lateral supporting band formed by orbicularis oculi muscle and orbital septum is fixed at the lateral orbital margin. From the outside, the upper and lower eyelid edges combine to form the outer corner of the eye. Therefore, when the outer canthus is opened, the tissue structure of the corner of the eye changes to a certain extent, and it is necessary to control the "degree" of opening.