The tears that coat the surface of your eyes have both a liquid and a mucous layer to them. It is normal to have a small amount of mucus in your tear film. But that mucus can significantly increase when the eye gets irritated.

Some of the most common causes of irritation that can make the eye overproduce mucus...

A wrinkle on the retina -- which is also known as an epiretinal membrane (ERM) or a macular pucker -- is a thin, translucent tissue that develops on the surface of the retina.

The retina is the inner layer that lines the inside of the back of the eye and is responsible for converting the light image into an...