Epicanthoplasty is eye surgery

Eye surgery

Eye surgery, also known as orogolomistician surgery or ocular surgery, is surgery performed on the eye or its adnexa, typically by an ophthalmologist.-Preparation and precautions:...

 to remove the epicanthal fold

Epicanthal fold

An epicanthic fold, epicanthal fold, or epicanthus is a skin fold of the upper eyelid, covering the inner corner of the eye....

s. It can be a challenging procedure because the epicanthal folds overlay the lacrimal canaliculi

Lacrimal canaliculi

The lacrimal canaliculi, also known as the lacrimal canals or lacrimal ducts, are the small channels in each eyelid that commence at minute orifices, termed puncta lacrimalia, on the summits of the papillae lacrimales, seen on the margins of the lids at the lateral extremity of the lacus...

(tear drainage canals).
An epicanthic fold can also be associated with a less prominent upper eyelid crease (a feature commonly termed "single eyelids" as opposed to "double eyelids"), and is a trait that appears more commonly in Asian ethnicities. The two features are distinct; a person may have both epicanthal folds and an upper eyelid crease, one and not the other, or neither.

Epicanthoplasty may leave visible post-surgical scar lines. A common corrective technique involves using what is called "Z"-plasty.