What is happening when my eyes get heavy when I am about to sleep?
What is happening when my eyes get heavy during sleeping?
Why do my eyes hurt when I wake up? Why do my eyes hurt after I wake up? Why should I close my eyes while sleeping? Why are my eyes  closing & sleepy? Why do eyes feel warm when you feel sleepy? What makes a person to go from light sleep to heavy sleep? Why do we get dark circles or bags under the eyes if we don't sleep enough? Why do we get dark circles around our eyes if we sleep late? What happens in our body while sleeping? What happens to the body when waking up from sleep? Is it bad when I wake up, walk to the hallway and feel like falling over and my eyes get blurry? Why can't I see when I close my eyes? Why do my eyes roll back when I pass out? It happened during the summer from dehydration.? What's the physiological cause for sunken eyes? Why does my cat cover its eyes when it sleeps? What are the causes of excessive sleeping? Why do our eyes turn red when we want to sleep? Why do I sometimes temporarily lose my sight (see black for a few moments, a minor head pressure of about 3 seconds, and everything returns to normal) when I'm tired? Why do I get a falling feeling in my sleep that wakes me up? What causes a person to feel tired even when they've had plenty of sleep? Why will our eyes turn red when we wake up from sleep? Why do I feel tired in the day and awake at night? Why do I still see something when I close my eyes? What happens chemically when your body recuperates from tiredness while you sleep? Why do I feel sleepy in the afternoon even after getting a proper 8-9 hours sleep last night? Why can't my eyes dilate? How can I sleep without closing my eyes? What's wrong with my eyes? Does my brain have anything to do with my eyes? Is body overheat during sleep what triggers the brain to create nightmares?