Review of the literature published in studying the relevant tear physiological function, tear discharge and blink, and as we combined with our clinical practice experiences in the lacrimal apparatus disease, we clearly put forward the theory that blink is the power of the basal tear secretion and discharger. The relationship between physiological function of the discharge basal tear and blink was studied; we also put forward the theory that there has no independent neural reflex arc, which has shared with the blink basal tear secretion. In this paper, we put forward the hypothesis that the blink is the power of the front tear film refreshment, formation and discharged. We make clear the concept of blink, classification, and basic neural reflex arc.