Contact lens wear
Two million individuals abandon soft contact lens wear altogether every year. Nearly 50% of these contact lens "dropouts" attribute dryness and discomfort as the primary reasons.
The glands that are producing tears for the eye can be attacked in Parkinson's disease, diabetes and auto-immune diseases like Rheumatoid arthritis, etc.
Refractive eye surgeries
Dry eye is the most common complaint or adverse event after LASIK.
Hormonal deficiencies or changes
Thyroid conditions and hormonal changes during menopause are also the common factors that are associated with dry eyes.
Low blink rate
Blinking is critical in spreading the tear film over the surface of the eye and stimulating tear production. A chronic low blink rate is associated with dry eye symptoms. Computer use, reading, and watching TV are the three activities most commonly associated with a low blink rate.
Dirty and oily eyelids
Oil from the eyelids can spill onto the surface of the eye and disrupt the composition of the tear film hence giving rise to dry eye symptoms. Dirty and oily eyelids usually appear red and burning sensation may be felt on the eye.