Question

why I can't see anything when I sleep​

Answer 1

Explanation:

because your eyes are closed

Answer 2

Answer:

This is a fantastic question

Explanation:

During sleep, our body can decide to ignore sounds, movements and smells happening around us which might otherwise wake us.This decision-making mostly happens in our brain.Although our ears continue to work as usual, our brain acts as a filter and decides whether we should respond to the sound and wake up or continue sleeping.

I hope it helps you..