What Causes Dry Eye?
Dry eye disease is ultimately a direct result of a lack of good quality tears. If your eyes are producing tears that are low quality or don’t make enough tears at all, your eyes won’t be able to lubricate themselves, leaving them itchy, dry, and irritated.
The Tear Film
The tear film is what keeps your eyes lubricated and comfortable throughout the day. When you blink, the tear film spreads across the surface of your eye, washing away bacteria and focusing light so you can see clearly.
The tear film is made up of 3 layers, so when 1 layer is out of balance, your eyes will feel dry.