There are several factors that lead to Dry Eye Syndrome development. They are not only pathologies of the organs of the visual system, but also many other conditions:
A decrease in tear production may occur when the hormonal background changes. It occurs due to age-related changes, infectious diseases, or pathologies of internal organs.
Adverse environmental conditions
External factors such as poor ecology, working in hazardous industries, being in rooms with excessively dry air, or frequent flights, lead to a change of the tear film composition. The surface of the cornea dries out quickly, resulting in a feeling of ache in the eyes, and increased sensitivity.
Prolonged reading or work at a computer
When spending several hours at a computer or reading, a person blinks less and strains eyes. In this case, the stability of hydration of the cornea and conjunctiva is disturbed. Feelings of pain and burning appear.
Diseases of the joints, heart, blood vessels, gastrointestinal tract, or endocrine dysfunction lead to an inadequate response of the immune system. It is characterized by impaired tear secretion and the tear film instability.
Dry eye syndrome often develops as a post-operative complication. That is why ophthalmologists recommend doing eye surgery (conjunctival cavity plastic surgery, keratoplasty, ptosis correction, laser correction) only in extreme cases.
Wearing of contact lenses
Dry Eye Syndrome can develop because of individual intolerance to the components of contact lens materials, because of an allergic reaction to contact lens solutions, or because of noncompliance with hand hygiene rules.
Changing of the regime and diet, drastic weight loss or weight gain and fast food eating can cause metabolic disorders. In the result symptoms of Dry Eye Syndrome may appear.
Dryness of the cornea can be the result of long-lasting medication therapy: antihistamines, oral contraceptives, and eye drops.
In most cases, Dry Eye Syndrome is caused by a combination of several factors. Therefore, in most cases combined forms of the disease are diagnosed. They are characterized by various degrees of severity and symptoms.