Your body produces three different types of tears. There’s the
basal variety, which are made as a form of lubrication and protection for your
eyes. These are constantly secreted in tiny quantities (about one gram over a
24-hour period) and coat your eyes when you blink.
You also produce reflex tears. These are another form of
protection and are released in response to irritants, such as wind, dust,
smoke, or cut onions. The third form of tears – emotional or “psychic” tears as
they’re sometimes called – are arguably the most talked about and the most
mysterious. Your tears, no matter what the form,
are a combination of salt water, oils, antibodies, and enzymes. Yet each
looks vastly different when examined under a microscope.
Source - Mercola Health
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