Keto Pure Trim Tears are produced in the lacrimal glands and drip through the upper and lower lacrimal point to the tubules and then to the lacrimal sac and nasopharynx.Their function is to moisturize the eyeball, flush out impurities and protect against infection.Normally, they are unnoticeable, however, if they are secreted excessively, there may appear the impression that the conjunctival sac is overflowing with tears