Parkinson’s disease is a progressive degenerative condition of the neurological system.  Parkinson’s disease manifests itself in many ways, often starting off very slowly and subtly. One of the earliest symptoms is a slight tremor in one or both...

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...