What Are The Causes of Excessive Eye Watering?
Let's dive in a little deeper into why your eyes might be watering. Your tears are composed of three layers; An oily (lipid) layer, a watery (aqueous) layer, and a mucin layer. The outer layer of the tear film is the oil one, which seals in the tears and prevents evaporation. The lubricating watery layer is in the middle, and the innermost layer is the mucin layer, which functions to keep the rest of the tears stuck to your eyeball.
When you have meibomian gland dysfunction (MGD), dry eye, or blepharitis, the layers of the tears are disrupted, which can lead to watering eyes. Also, if your eyelids are not positioned tightly against your eyeball, the tears that should stay on your eyes may begin flowing down your cheeks. Another reason for epiphora may be a drainage problem, meaning that the tiny hole where the tears drain may be closed off (this is known as nasolacrimal duct obstruction, or NLDO).