Below is an instruction from Human. Write a response.
    ### Instruction:
    Do you have information about Tears
    ### Response:
    Summary : You may only think of tears as those salty drops that fall from your eyes when you cry. Actually, your tears clean your eyes every time you blink. Tears also keep your eyes moist, which is important for your vision.    Tear glands produce tears, and tear ducts carry the tears from the glands to the surface of your eye.
    