Eyelids with a noticeable arch-shaped crease on the upper eyelid are called double eyelids, while eyelids without this crease are monolids. Your chance of having double eyelids is primarily based on ...

Share on Pinterest Triple eyelid occurs when the upper eyelid has two folds instead of one. It may be caused by extra skin, loss of fat due to aging, or weakness of the muscles in the eyelids. Credit ...