Why do you close you're eyes when you sleep?

Why do you close you're eyes when you sleep?
To protect them.Your eyes are insulted each time by the wind, weather, smoking, etc. They are complex and requirement rest like the rest of our body.So it is fluent we shut our eyes when we turn off our brain, so to speak. Nitey.
Keeps the bugs out and it is easier to see dreams on a blank blind.
So they won't dry out. duhh!
If we didn't, our eye balls would shrivel up close to little raisins in the sockets. YUK
its dark
Because your eyes need to be constantly raining. Otherwise, they can actually dry out! That's why it's tricky to win staring contests. That's also why you blink! It's an automatic reflex to keep your eyes hydrated. There's fuid on the inside of your skin that help do that.
apparently i don't close my eyes when i sleep because my husband recently notice that i just look resembling I'm awake and just blinking ... so i asked my mom and she said that yes i do sleep near my eyes open and that i other have even when i be a baby
bit of a sciency answer for u but within order to sleep u necessitate a build up of a chemical serotonine, which is destroyed by light. so by closing ur eyes ur blocking rotten light. also by ur eye person open it distracts u n keep u awake by sending messages to ur brain. closing ur eyes also prevents dirt etc getting in ur eye.
To shut down the optical sense so you can rest.
can't sleep with them break open
my sister sleeps with her eyes partly open.
it be freaky.
we used to make face at her while she slept. haha.
now her daughter is resembling that too... i won't do that to her.
so u don waste your time blinkin