Most tears will flow over the surface of your eyes and drain out the corners of your eyelids, through the tear ducts, which lead into the nasal cavity. If you cry an abundance of tears, the tears overflow the nasal cavity and start running out of your nose.Even when you are not crying, tears flow from your lacrimal glands with every blink, moistening your eyes. This moisture – made of water, oil, and mucus – helps to maintain healthy vision. Tears clear your eyes of debris and allow light to enter your eyes so you can see.
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