Let's go into details and explore different ways !!

Our eyes shed tears for a number of reasons, a jar of tears falling on our faces is a strong symbol of sorrow, but we can cry for other reasons like slicing onions, or perhaps trying to blink our eyes.

But it is important that tears help maintain healthy eyes, experts told us in the journal Live-Science. For example, basal tears flow continuously from the glands, or with a tiny amygdala structure in the corner Internal to the eye. When you brush, the underlying tears are cleaned and lubricated - making them oily - the eye, which makes the outer surface of the eye smooth and helps you to see clearly, according to observations from the American Academy of Ophthalmology

In addition, reflective tears, or those that are shed unconsciously, help to clean the eyes from irritants, which include particles of dust, and gases containing sulfur, such as those emitted from cutting a slice of onions, according to Dr. Silva-André Silva).

Other factors that affect human crying are feelings or emotions. They can play a big role in making us shed tears. These tears are called "emotional tears", sometimes referred to as "psychological tears," which may appear as means of nonverbal communication, Silva explained.

"Children cry to attract the attention of their mothers who may be busy with them, and this is categorized as a pure call to draw attention," Silva said in a mail to the journal Live Science.

"This is something wrong and misleading, since the child is not fully cognitively capable of becoming manipulative with people; in other ways, we can consider those tears among the basal tears," Silva said. "Children are able to manipulate adults by crying. / Reflectivity, and emotional tears ».

As people age, people begin to use their tears as a means of expressing emotion or feeling, such as happiness or sadness, and these tears can enhance compassion or sympathy for others, Silva said.

But be careful of people who can use their tears to manipulate others. Silva said: "Sensitive people can be manipulated by crying others, and it is also easy to use those tears by others to manipulate them."

So it is worth saying that emotional tears have advantages and disadvantages. "It is a great tool for communication, and at the same time a powerful tool in manipulation," Silva said.

"It is difficult to cry about us, on the one hand, to hide our feelings when we are in the middle of a severe psychological predicament."

Chemistry of tears

Studies show that basal, reflexive and emotional tears have their own chemistry.

Basal tears consist of three layers: a thin mucus layer directly on the eye, a water layer in the middle, and a thin layer of oil at the top preventing the tear from evaporation, according to Ted-Ed, a site devoted to the dissemination of educational passages.

Reflective tears have these three layers, but they have a larger water molecule and higher levels of antibiotics that have the ability to stop harmful microorganisms compared to basal tears, according to the Ted-Ed site.

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