Like since our eyes are always “seeing” and when we close our eyelids we just see black and most people when they sleep there in a dark room so why do we need to close our eyes?
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The thing is, our brains are wired to respond to certain cues when it comes to sleep. One of those cues is darkness – when we’re in a dim environment, our brains start to produce melatonin, the hormone that helps regulate our sleep-wake cycles. So, even if we’re in a pitch-black room, our brains will still be getting some visual input from our surroundings. Closing our eyes helps to block out that last bit of stimuli, making it easier for our brains to settle into sleep mode.
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