Sarah is the author of nine novels. The ninth hard cover, Above the East China Sea, was published by Alfred A. Knopf in 2014. The soft cover is being released by Penguin on April 28, 2015.
Tear over-secretion is usually caused by irritation or inflammation of the surface of the eye. This can occur for a number of reasons, including eyelash and eyelid problems or allergies. Oddly, a dry eye problem can sometimes cause watery eyes, because the eye produces excess tears to combat the irritation and dryness.
exists and is an alternate of . Tears lubricate the eyes and protect them from dirt and infection. During normal flow, tears wash over the eye and drain through ducts into the nasal cavity. During heavy flow, the extra tears spill over the eyelids to wash away particles too large for the ducts. As far as humans are aware there is no purpose why we cry when we are upset - it may be more of emotional reason (physical release for our pain) but our tear ducts are to wash away foreign objects in our eyes.