What Is Dry Eye Disease

Our eyes need tears to stay healthy and comfortable. If your eyes do not produce enough tears, it is called dry eye. Dry eye is also when your eyes do not make the right type of tears or tear film.
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Each layer of the tear film serves a purpose. The oily layer is the outside of the tear film. It makes the tear surface smooth and keeps tears from drying up too quickly. This layer is made in the eye’s meibomian glands. The watery layer is the middle of the tear film. It makes up most of what we see as tears.