Some people sleep without closing their eyes completely. This is known as nocturnal lagophthalmos (nocturnal lagophthalmos). Is it serious?

Lagopthalmos is usually caused by problems with the nerves or muscles in the face that make it difficult to keep the eyes completely closed. Here are some of the reasons:

- Bell paralysis
- trauma or injury
- stroke
- neuromuscular disease
- autoimmune condition
- infections (Lyme disease, chicken pox, polio, etc.)

But, some people can sleep with their eyes open due to physical damage to the eyelids. Eyelid surgery or scars from burns or other injuries can damage the eyelid and make it less able to close completely.

For some others, there is no specific and serious reason. It can also be hereditary. Rarely, thick lashes can make it difficult for someone to keep their eyes completely closed at night.

Sleeping with your eyes open is usually not serious. However, if you wake up with dry eyes, have pain, redness or blurred vision, you should see a doctor.

Sources: WebMD, Healthline