This is called the epicanthic fold, and is the reason why most Asian eyes look smaller and slanted.

这条褶皱叫做内，这也是为什么亚洲人眼睛看起来更小并且上挑更明显。

Not to be confused with the epicanthic fold which is positioned lower and reaching the corner.

不要把盖帽眼和内弄混了，位置更低并且接眼角。

The epicanthic fold itself can come in several types.

内本身会以多种形态呈现。

Even strong epicanthic folds can become less-defined over time.

甚至很明显内时间长了也会慢慢变得看不太出来。

I seem to have a pretty weak epicanthic fold, with a relatively flat eyelid.

看起来我有很不明显内和相对平坦眼。

She addressed herself to the stillsuit manufacturer's feminine companion—a tiny, dark-haired woman with a doll face, a touch of epicanthic fold to the eyes.

她向蒸馏服制造商女伴说话——一个身材矮小黑发女人，长着一张娃娃脸，眼睛上有一丝内。

In case you were wondering, it is possible for you to have both the epicanthic fold and the supratarsal crease, you can have one and not the other, as well as the rare case of having neither.

你也许会觉得奇怪，但你可能既有内，也有上睑折痕，你也可能只有其中一个，也可能两都没有，但最这种情况比较罕见。