- Tearing eyes: definition
- The production and drainage of tears
- The tear film
- Possible causes of watery eyes
- Treatment watery eyes
Normally, tear fluid collects in the nasal corner of the eye, i.e., the corner of the eye located at the nose. These two small openings called tear points. By the blinking movement of the eyes there is a suction effect of the tear point and through a tear duct, the tears come into the lacrimal sac, after which it flows into the nasal cavity through the nasal lacrimal duct. This explains why one should weep after blow. Not all tears are discharged via this ingenious drainage system. A part of the tears will disappear by evaporation. It has been estimated from about 10 to 20%.
The tear film is composed of three components:
- The outermost layer: an oily layer, which is produced by the meibomian glands. This oil-like layer prevents the tear fluid evaporates too quickly.
- The middle layer: an aqueous layer which is produced by the glands in the mucosa, and by the lacrimal gland. This layer has the task to clean the eye wash dirt and dust. Also, this layer has an anti-bacterial function. Furthermore, it provides the outer horny layer of oxygen.
- The inner layer: a slimy layer, originating from small glands in the conjunctiva of the eye. This layer should ensure that the aqueous layer is evenly distributed over the eye and can adhere well to the surface. It also serves as the wetting of the eye.
Watery eyes, excessive tear production due to reflex tears or pseudo tears
Reflex tears means that the tear production increases in eye irritation. A source of irritation is a foreign body in the eye, a hair that rub against the eye, and inflammations of the eye or the eyelid.
Pseudo- or neptranen is a condition where the eye is weeping because it is too dry. When the quality of the tear film is disturbed, the cornea dries out and through the nerves there is a call at the lachrymal gland in order to produce more tears. This causes an overproduction of tears, tears often qualitatively still not enough so the irritation persists for life. They are not nurturing tears, lubricating eye irritation and did not therefore persists. Treatment with tear substitutes can provide relief of symptoms and break this vicious circle.
Tearing eyes: a dysfunction of the lacrimal pump
The pumping action of the eye can be disrupted by various causes, such as a weakened eyelid, which is particularly prevalent in older people. As a result, are the eyelid and the lacrimal point must not fit snugly against the eye, with the result that the tears do not go well at the tear point. Also cause muscle paralysis, scar and other abnormalities, can a ceding eyelid.
Tearing eyes: deviations from the drainage of tears
There is a blockage or narrowing in the drain system may be provided by, for example, a congenital abnormality, an inflammation, a blocked nasal lacrimal duct or an accident, which leads to watery eyes. It is also possible that the tear points do not sit in the correct place, or are clogged or narrowed.
Tears Ende eyes in children
In babies from 0 to 1 year, watery eyes fairly common. In that case, the entrance of the nasal lacrimal duct into the nose has not yet opened. The eye that weeps and is often dirty. This often goes away.
An eyelid surgery can be performed under local anesthesia when the tear points and / or the lid does not fit properly. When an abnormality in the exhaust system, there could possibly be done traanwegoperatie. One tries thereby to lift the blockage. The procedure depends on the site of blockage. When the tear ducts are blocked and can not be corrected, may offer a solution traanwegprothese, whereby between the corner of the eye and the nose is placed a tiny tube.
In children, opens the entrance to the nasal tear duct in many cases automatically, when the child is between nine months to a year old. Gently massage can help the lacrimal sac. Minor surgery may be necessary to open the passage, when the problem persists.