1. Dry eyes
Dry eyes can result in symptoms such as stinging, burning, redness or excessive watering. It happens when there is a problem with the tear film that coats the eyes and keeps them moist. “The most common cause is a dysfunction of the meibomian glands: small, delicate glands in the eyelids that produce an oil that prevents tears from evaporating,” says Greg Moloney, MD, an ophthalmologist and clinical assistant professor in the department of visual sciences at the University of British Columbia.
Decreased tear production is another factor. Certain medications, autoimmune conditions, eye surgeries, hormonal changes and normal aging can impact the lacrimal glands, which secrete tears.
Dry eyes can also develop after wearing contact lenses for too many hours, or from exposure to wind, dry air or air conditioning.