Along with the single upper eyelid, the epicanthal fold is a defining characteristic of East Asians. It is a fold of skin which covers the inner corner of the eye, leading to a sharp narrow angle which gives the eye a “slit like” appearance. Although it is almost universally present in Asian people, the degree of severity will vary significantly between individuals.
The main drawback with this operation is that it does potentially leave a very small visible scar on the inner side of your new double eyelid fold, whereas in a simple double eyelid procedure the scar is hidden in the depth of the new supreatarsal (double eyelid) fold (therefore not visible with the eyes open).
It is important to realize that all scars have the potential to become thick or unsightly (hypertophic or keloid scars). Although these are rare on eyelid skin, it is one of the risks that Mr Lin will discuss with you during your consultation.