Tearing
Tearing is the process of producing and shedding tears from the lacrimal apparatus of the eye. It is a natural response to various stimuli, including emotional states, irritants, and medical conditions.
Physiology[edit | edit source]
The production of tears is primarily managed by the lacrimal gland, which is located in the upper outer region of the orbit. Tears are composed of a mixture of water, salts, antibodies, and enzymes, which help to lubricate the eye, remove irritants, and provide a protective barrier against infection.
Types of Tears[edit | edit source]
There are three main types of tears:
- Basal tears: These are continuously produced to keep the cornea lubricated and nourished.
- Reflex tears: These are produced in response to irritants such as wind, smoke, or onions.
- Emotional tears: These are produced in response to emotional states such as sadness, joy, or frustration.
Causes of Tearing[edit | edit source]
Tearing can be caused by a variety of factors, including:
- Emotional states: Strong emotions can trigger the production of emotional tears.
- Irritants: Substances like smoke, dust, or chemicals can cause reflex tearing.
- Medical conditions: Conditions such as conjunctivitis, dry eye syndrome, and allergies can lead to excessive tearing.
- Obstruction: Blockage of the nasolacrimal duct can prevent tears from draining properly, leading to tearing.
Diagnosis and Treatment[edit | edit source]
Diagnosis of excessive tearing involves a thorough examination of the eye and the lacrimal system. Tests may include:
- Schirmer's test: Measures tear production.
- Fluorescein dye test: Assesses tear drainage.
Treatment depends on the underlying cause and may include:
- Artificial tears: To lubricate the eye in cases of dry eye syndrome.
- Antihistamines: For allergic reactions.
- Surgery: To correct structural issues such as nasolacrimal duct obstruction.
See Also[edit | edit source]
References[edit | edit source]
External Links[edit | edit source]
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