2. Why do people keep winking their eyes?
Where do birds sleep?
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Every time you blink, your eyelids spread a cocktail of oils and mucous secretions across the surface of the eye to keep your globes from drying out. Blinking also keeps eyes safe from potentially damaging stimuli, such as bright lights and foreign bodies like dust.
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people clear their eyes by tears over its outer surface it also protect your eyes we closing it because to keep our eyes out of dust and many other things
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