Dry eye syndrome (also known as dry eye disease) is a common condition that occurs when the eyes are unable to produce enough tears, or the tears evaporate too quickly.

Dry eye can make the eye feel dry, scratchy and uncomfortable. It generally affects both eyes but on occasions can cause greater discomfort in one eye than the other.

If left untreated, dry eye can lead to pain, scarring and ulcers on the cornea, and some loss of vision. Permanent loss of vision from dry eye is extremely rare.