Why can dry eyes lead, in turn, to watery eyes?

When the quality or the quantity of tears is not good –within a certain range– the body reacts and stimulates the secretion of tears as a protective measure. A circle is started: the eye perceives that it is dry and produces a little tear secretion, although because this is still not enough and does not solve the problem, it perceives it is dry again and produces a little more. This continues until the capacity of the tear drainage system is exceeded, leading to watery eyes. 

Therefore, the use of artificial tears in patients with dry eye mostly solves the watery eye problem, as the eye is correctly lubricated and the balance is re-established.

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