Let’s dive into the world of tears !!!
We know that protect, nourish and improve the optical quality of the eye.
And that keep moisture, eliminate waste, foreign bodies and protect our eyes from infection.
They are liquid located in the pit tear produced by the lacrimal glands (located on top outside of each orbit, outer corner of the eyelid), there are several glands accessory located on the eyelid (meibomian glands) secretion also part of the tear film.
They clean and maintain the surface of the eye moist, nourish the cornea in its outer part and act as a lubricant to facilitate the movement of the eyelids, thus helping the smooth functioning of the eye and its structures.
The tears distribute oxygen to the eyes flicker and distributes them constantly.
For its bacteriostatic function alters and undoes the walls of bacteria, thanks to gamma globulin and lysozyme.
They have secondary functions, such as absorbance of ultraviolet rays of the sunlight (function fotoabsorbent) and drag-flicker small foreign bodies (protective function)
Its route, ends up by the nasolacrimal duct in the nostrils, 25% of them evaporate with air.. When it increases the production of tears causes rhinorrhea (exit fluid from the nose).
If moisture disappears nose causes nasal dryness.
The nerve stimulator of lacrimal gland for produce tears is the lacrimal nerve. When the temperature changes, extraneous motives or mental act, inform the brain of these attacks and launches increased tear production.
The alteration of tears affects visual acuity and clear vision.
In general, the tears are formed by water, sodium chloride (common salt) and albumin.
98% water and 2% remaining organic substances, oils, enzymes and antibodies.
This lacrimal fluid is composed of water, mucin, lipids, lysozyme, lactoferrin, lipocalina, lacritina, immunoglobulins, glucose, urea, sodium and potassium
A tear has three parts:
On the outside, the lipid (oily), comprising fatty acids produced by the glands of the eyelid. Prevent the evaporation of tears.
The middle part is mostly aqueous (composed of water, salts and proteins).
Formed by the inner component mucínic (mucosa) is responsible for maintaining tear adhered to the surface of the cornea.
If one of these parts is altered, eye diseases appear.
If the lacrimal gland of the eye is affected by various diseases such as rheumatoid arthritis or lupus, produces fewer tears. One has the feeling of having something in the eye, dry eyes and blurred vision.
The remedy against this problem is to use artificial tears every day
Inflammation of the eyelids. A malfunction of the glands of the eyelid, they produce an oily secretion which helps to lubricate the surface of the eye and eyelids, preventing the evaporation of tears. Symptoms may be irritation, eyelid crusting, itching, burning, redness and peeling in the tabs, madarosis (loss of eyelashes).
The cause may be allergic, infectious, seborrheic, irritant … Eyelid hygiene is essential
It is the dry eyes due to lack of sufficient tears or a poor quality of them to keep well-lubricated and nourished eye. There is no single cause of dry eye.
Rarely produce significant injuries to the eye.
The symptoms are burning sensation, burning sensation, blurred vision, red eyes, photophobia (discomfort to light), conjunctivitis, pain. Accentuated with increased evaporation (heat, wind, air conditioning) or with prolonged reading (because it reduces flicker in charge of the distribution of tears).
It is more common in women than in men for hormonal differences.
The incidence increases with age.
The treatment involves the use of wetting eye drops or artificial tears.
It’s infection of lacrimal bag for nasolacrimal obstruction.
It can be acute or chronic.
When is acute is form an abscess and appears in the inner corner of the eye swelling hard, red, painful, which can be spread around (eyelids, nasal root).
In the chronic form, there are long-lasting and watery secretions
Clogged tear ducts or stenosis of the tear. The drainage of tears is interrupted.
Do not drain properly, causing watery eyes and an increased risk of infection and inflammation in the eye.
Causes a constant and annoying tearing, itching, discomfort, eye redness, and difficulty legañas completely close the eye.
Some causes are: facial paralysis, deviation of the nasal wall area, conjunctivitis calculi (stones) in the lacrimal gland, allergic rhinitis, facial trauma …
The lacrimal obstruction is very common in young children. 90% of cases resolve spontaneously. The newborn has a constant watery secretions and you are at the bottom of the conjunctival sac (space between the eyelid and the eyeball). If not resolved spontaneously after three months is considered pathological. We recommend you consult your pediatrician.
In adults, the obstruction may be due to different causes such as recurrent infections (conjunctivitis), changes in the nostrils (deviation of wall area) or facial trauma …
Thera are three TYPES of tears:
- BASAL TEARS OR LUBRICANTS
They have a maintenance function of our eyes. We constantly secreted in small amounts to keep the eyes lubricated and protected from dirt outside. If insufficient eye dries out and if there is excess may indicate obstruction of the lacrimal sac.
- TEARS REFLEXES
They have a protective function of our eyes, as a shield. Contain more amount of antibodies that identify and neutralize any organism (bacteria, viruses or parasites) that can enter the eye.
They are more abundant than the baseline.
Activated for eye irritation in response to an external stimulus. The cause may be a brush or blow, a strange particle (dust, smoke, irritants such as sulfenic acid and propanotial onion being peeled, vapors, tear gas, pepper around the eye. ..) in the cornea, conjunctiva or nasal mucosa, a bright light stimuli hot or spicy touch of substances on the tongue and mouth … It is also associated with vomiting, coughing and yawning.
Reflex tears washing acting irritants that may have been in contact with eyes.
- EMOTIONAL OR MENTAL TEARS: Crying and sobbing
Activated in response to internal stimuli, emotions (feelings of sadness, joy and excitement extreme) or excess stress. This reaction to an emotional state resulting in tears.
The body perceives these extreme moods can be dangerous and fast to stabilize the emotions, and sends tears like a defensive weapon, the same way that accelerates the heart rate and breathing slows in these circumstances.
Tears caused by emotions have different chemical composition tears that lubricate the eyes.
Contain more prolactin hormone, corticotropin and leucine enkephalins (a natural painkiller) than basal tears or reflexes.
The parasympathetic control lacrimal glands through by the neurotransmitter acetylcholine. When these receptors are activated, the lacrimal gland is stimulated to produce tears.
Crying can be accompanied by redness of the face and sobs pretending to cough, convulsive breathing, sometimes spasm of the entire upper body.
Help in the process of stabilization emotional.
Emotional tears help both relax and integrate socially.
- Every day a person can produce about 400 drops of tears, about 9.5 ml.
With aging, the production of tear secretion decreases almost 60%. Occurs more in women than in men.
- During long been thought that tears were the main sign of weakness of a person.
- Women cry more than men. It causes the influence hormone (prolactin and testosterone) and cultural (that instill crying is a sign of weakness, especially in men, making suppress emotions).
- The origin of tattooed tears are very common and can be traced back to Mim (Pierrot). From him many followed his style pampering.
- Ex-convicts have black tattooed tears out of her eyes, symbolizing each one of them committed a murder.
- In ancient Greece, the heroes were allowed to cry.
Views microscope, Rose-Lynn Fisher in his project topography of Tears where he studied 100 tears, discovered that tear each microcosm takes a completely different and crystallization results in multiple forms, yet have the same chemical composition.
VERY IMPORTANT !!!
“Crying is not a sign of weakness.”
The act of crying is universal, occurs in all cultures, but it is still largely a mystery.
There are theories that suggest possible search weeping, acceptance and understanding social empathy with others.
It isn’t good routinely contain tears, serve to eliminate toxins accumulated in the body due to stress. Reduce and improve the mood.
An old Irish proverb reminds us that “The tears are shed bitter, bitter but are not spilled”
And Voltaire in 1764 says “Tears are the silent language of grief”
That beautiful words …
And do not forget, if you need to cry, crying is good for health.