- 1. Ageing
Dry Eyes are part of the natural ageing process. As we get older, the composition of our tear film alters making our tears less adherent to the surface of the eye causing dryness.
- 2. Medication
Many drugs (e.g. blood pressure drugs, HRT, anti-histamines and anti-depressants) can cause dry eyes by reducing the mucus and water content of the tears.
- 3. Other Medical Conditions
Diabetes, Sjogren’s syndrome, thyroid disease are examples of conditions which reduce tear production.
- 4. Fat Gland Dysfunction
Fat glands in our eyelids produce the top layer of our tear film. If these are blocked, our tears can evaporate more quickly with a thinner fat layer of the tear.
- 5. Staring At Screens
This leads to a reduced rate of blinking and an inefficient moistening action on the surface at the cornea leading to dryness.
- 6. Environment
Windy conditions, air conditions in offices, central heating can all make your tear film dry out more quickly.