How a tear is created in the eye?!


Question: When we laugh the salty water also comes out from our eyes?
ON the other hand when we weep the tears spring off our eyes.How can we prvent our tears?


Answers: When we laugh the salty water also comes out from our eyes?
ON the other hand when we weep the tears spring off our eyes.How can we prvent our tears?

I really don't know why you would want to prevent them.

There are three very basic types of tears:

Basal tears: In healthy mammalian eyes, the cornea is continually kept wet and nourished by basal tears. They lubricate the eye and help to keep it clear of dust. Tear fluid contains water, mucin, lipids, lysozyme, lactoferrin, lipocalin, lacritin, immunoglobulins, glucose, urea, sodium, and potassium. Some of the substances in lacrimal fluid fight against bacterial infection as a part of the immune system.

Reflex tears: The second type of tears results from irritation of the eye by foreign particles, or from the presence of irritant substances such as onion vapors, tear gas or pepper spray in the eye's environment. These reflex tears attempt to wash out irritants that may have come into contact with the eye.

Crying or weeping (psychic tears): The third category, generally referred to as crying or weeping, is increased lacrimation due to strong emotional stress, depression or physical pain. This practice is not restricted to negative emotions; many people have been known to cry when extremely happy or when they are laughing. In humans, emotional tears can be accompanied by reddening of the face and sobbing



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