Dry eye occurs when there is a problem with the basal tears. Basal tears are not like emotional tears, which are comprised of oil, water, and mucus. The oil helps prevent the tears from drying too quickly on the surface of the eye. The watery layer helps the tears spread evenly over the eyes, and the mucus layer combines with the watery layer to help ensure eye hydration. If any of these layers are deficient, symptoms of dry eye can develop.
- Medications – The most common cause of dry eye is prescription and OTC medications. Usually, they will list dry eye as a side-effect.
- Older Adults – As we age, the basal tear production in the eyes can reduce. This is why most people who have dry eye are over the age of 50.
- Having an Immune Disorder – Autoimmune disorders can cause dry eyes. Common conditions include Lupus, rheumatoid arthritis and Sjogren’s syndrome.
- Having Allergies – Seasonal allergies can lead to dry, itchy scratchy eyes.
- Environmental Conditions – Individuals who work in dry, dusty or windy conditions can develop symptoms of dry eye.