Dry eye is a complex disease of the tear glands and surface of the eye that causes ocular discomfort, blurred vision and tear film instability which can lead to ocular surface damage.
In recent years, cases of dry eye have significantly increased due to deteriorating living conditions (pollution, computer screens, air conditioning, etc.).
Nowadays, almost one in three adults is concerned !
In this case, even if the lacrimal gland works normally, a poor or insufficient oil layer may lead to tears evaporating 4-16 times faster than normal.
The lipid layer may be disturbed for many reasons :
- A Meibomian Gland Dysfunction (The glands may be blocked due to a thick meibum)
- Wearing contact lenses
- Diseases and allergies that affect your eyes
- Not blinking frequently enough (computer use, television…)
- Outdoor environment such as windy conditions and a low humidity.
- Air conditioning (extended travel by airplanes or cars)
It occurs when the lacrimal gland does not produce enough of the water component to keep the eyes moist. The final conclusion is a dry ocular surface. It could result from some diseases, such as Sjogren’s syndrome, medications or Lacrimal Duct Obstruction.