Before we understand the causes behind dry eyes, it is important to know how the process of .
What are Tears?
Tears that our produce are essentially a protective and layer on the surface of our eyes. Tears are a mixture of , proteins, peptides, fatty acids, , and , mostly salts. These tears can be divided into three layers, consisting of , water, and . The oil is produced in the meibomian while the electrolyte water is produced by lacrimal glands. The presence of mucus helps in evenly spreading the oil and water on the surface of the eyes. The oil, water, and mucus come together to form a thin layer on the surface of the eye, known as tear film.
How are Tears Produced?
These tears are produced by tear ducts, scientifically known as meibomian glands and lacrimal glands. These small glands are on the of both the eyes and produce tears which constantly protect and clean our eyes from foreign and as well as from , and yeast infections.
What is Dry Eye Syndrome?
Any damage or results in dryness, , and a burning sensation in the eye. Dry eyes are referred as keratoconjunctivitis sicca, which means a decrease in the quality/quantity of the tear supply. The eye depends on moisture for its proper functioning. The lesser the supply of tears, the worse the condition becomes.to the delicate tear film of the eye causes a condition called dry eye . When deprived of tears, the eyes suffer a chronic lack of due to damage to the tear gland. This
According to the Optometric Clinical Practice Guidelines by the American Optometric Association, dry eyes have been categorized into:
- Aqueous deficient dry eye: This is a condition where lack of water in tears is the cause.
- Mucin deficient dry eyes: In this condition, a lack of mucus in tears is the root cause.
- Surface abnormalities: These include an irregular epithelial surface on the eye surface.
Dry eyes can occur due to temporary issues or long-term issues. Some of the common causes are explained below:
- Arrested tear production and evaporation: Dry eyes could result from arrested tear production and tear evaporation. Some common causes include advanced age, autoimmune diseases, lupus, and arthritis. changes, decreased oil, water, or mucus production in the tear glands, damage to the tear glands, various
- Inadequate blinking: Dryness in the eyes could happen due to inadequate blinking as well. Every time we blink, the tears concentration, we unconsciously cease blinking. This causes strain on the eyes. This strain adds up and causes dryness, , and even damage in certain cases. our eyes and decrease . Often, when we are TV, working on the or working on something that requires a great deal of attention and
- Contact lenses: Use of contact can also be attributed as a cause of dry eye syndrome. Wearing contact lenses is also attributed to bacterial keratitis. As the contact lens sits on the surface of the eye, it hinders the free of tears on the surface, which leads to excessive evaporation of tears and dry eye syndrome.
- Medications: Certain types of medications such as , , beta- , and are known to decrease tear production.
- Diseases: Conditions such as or ’s make it difficult to close the eyes. This causes tear evaporation and leads to rapid drying out of the eyes.
- Aging: Dry eyes are also common among old menopause, may also be the cause of dry eyes. . Due to , the tear film begins to and thus gets damaged. Aging processes, such as
- Vitamin A deficiency: A lack of vitamin A also leads to dry eyes. Vitamin A is one of the most important in regards to eyes. The in help in building up the tear glands. In the long run, a of vitamin A may lead to night and cloud formation in front of the eyes.
- Blurred vision: Due to the lack of moisture, the eye fails to function ideally and vision might be . When this happens, the patient should rest his eyes and not expose them to any form of strain.
- Foreign body sensation: The patient that there is something in their eye.
- Sjogren’s syndrome: In some cases, dry eyes, along with dry mouth and dry with minimal secretion, is an indication of a called ’s syndrome, which is an disease.
- Excessive tears: Rarely, dry eyes may cause excessive tear production. This works as a protective mechanism when dryness overstimulates the production of tears.