How To Tell If You Have A Monolid Or A Double Lid

There is just one major difference between monolids and double eyelids. According to Byrdie, the difference is the existence of a crease in double lids. Monolids don't have a crease, and double lids are called double because their crease emulates two eyelids instead of one. Therefore, when you look in the mirror, if you see a defined crease, you have a double lid. If you don't see one, you likely have a monolid. However, Healthline noted that hooded monolids exist, which is when your eyelid hood hangs down, covering your crease and making it look like you have a monolid.

Eyelids, like many other traits on our faces, are tied to genetics. According to Verywell Health, monolids are a recessive genetic trait. Because of this, they're not expressed in offspring as often as double eyelids are because double eyelids are the dominant trait. Furthermore, like other cosmetic procedures have come to pass, eyelid surgeries have become popular for those with double lids who want to have a monolid.

Ultimately, the shape of your eyelid is changeable, but it's also nice to know that it's something you share with your loved ones.