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  2. Tears - Wikipedia

    en.wikipedia.org/wiki/Tears

    The functions of tears include lubricating the eyes (basal tears), removing irritants (reflex tears), and also aiding the immune system. [3] Tears also occur as a part of the body's natural pain response. [4] Emotional secretion of tears may serve a biological function by excreting stress-inducing hormones built up through times of emotional ...

  3. Glow stick - Wikipedia

    en.wikipedia.org/wiki/Glow_stick

    A glow stick, also known as a light stick, chem light, light wand, light rod, and rave light, is a self-contained, short-term light-source. It consists of a translucent plastic tube containing isolated substances that, when combined, make light through chemiluminescence. The light cannot be turned off and can be used only once.

  4. Crying - Wikipedia

    en.wikipedia.org/wiki/Crying

    There are three types of tears: basal tears, reflexive tears, and psychic tears. Basal tears are produced at a rate of about 1 to 2 microliters a minute, and are made in order to keep the eye lubricated and smooth out irregularities in the cornea. Reflexive tears are tears that are made in response to irritants to the eye, such as when chopping ...

  5. Lightbulb joke - Wikipedia

    en.wikipedia.org/wiki/Lightbulb_joke

    Lightbulb jokes are often responses to contemporary events. [14] For example, the lightbulb may not need to be changed at all due to ongoing power outages. [15]The Village Voice held a $200 lightbulb joke contest around the time of the Iran hostage crisis, with the winning joke being: [16]

  6. Magic (illusion) - Wikipedia

    en.wikipedia.org/wiki/Magic_(illusion)

    Teleportation: The magician causes something to move from one place to another—a borrowed ring is found inside a ball of wool, a canary inside a light bulb, an assistant from a cabinet to the back of the theatre, or a coin from one hand to the other. When two objects exchange places, it is called a transposition: a simultaneous, double ...

  7. Blinking - Wikipedia

    en.wikipedia.org/wiki/Blinking

    Blinking is a bodily function; it is a semi-autonomic rapid closing of the eyelid. [1] A single blink is determined by the forceful closing of the eyelid or inactivation of the levator palpebrae superioris and the activation of the palpebral portion of the orbicularis oculi, not the full open and close.

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  9. Artificial tears - Wikipedia

    en.wikipedia.org/wiki/Artificial_tears

    Artificial tears work by adding similar lubricating elements that natural tears contain. [17] This helps thicken and stabilize the pre-corneal tear film, prolonging tear film breakup time, and allowing for tears to properly protect the surface of the eyes. [17] Most artificial tears do not require a prescription and can be used as often as needed.

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