blink

While sleeping, we can't blink. Blinking is how our eyes stay lubricated, and offers protection from environmental damage, whether too much bright light (think about how often you blink when you move from a dark room to a bright one) or dust and debris in the air. :), there is your answer ;)

okay but I didn't ask for the answer but thank you also I did not say blink while sleeping I said if you blink do you go to sleep for a second

ohhh ,sorry but you're welcome

its ok