Sleeping with eyes open is a condition known as nocturnal lagophthalmos. Incomplete eyelid closure: Some individuals may have difficulty fully closing their eyelids due to muscle or nerve problems.

If you’ve ever shared a bed with someone with nocturnal lagophthalmos, especially if they didn’t warn you in advance, it’s ...

Most animals close their eyes when they sleep. But did you know some amazing creatures can actually sleep with their eyes open? It might seem strange, but these animals have developed abilities to ...

Have you heard the saying about “sleeping with one eye open”? It’s a bit of metaphoric advice about staying vigilant—and a way to describe very light restless sleep. But sleeping with eyes open is ...

Cats do some pretty weird things. If you share your home with one, you could probably list a few. Sometimes, their behaviors give their owners a good chuckle, like when they sleep in cardboard boxes, ...

Laura holds a Master's in Experimental Neuroscience and a Bachelor's in Biology from Imperial College London. Her areas of expertise include health, medicine, psychology, and neuroscience.View full ...