why is it hard to keep the eyes open when you’re so sleepy? Does keeping the eyes open requires that much effort?
In: Biology
Eyes see things. When we go to sleep, we don’t want to see things, we want to sleep. So the body tries to close the eyelids when it wants to sleep.
Your eyelids are controlled by muscles, and like any muscle in your body they can get tired. Your whole body was more or less designed to stay awake a certain amount of time. So your eye lids have enough strength in them to stay open for that amount of time. Your arms and legs should also feel pretty heavy by the very end of the day. Most of your brain is turning down the power to various parts of it, making it more of a conscious effort to work to do things that were usually more automatic or subconscious.
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