Blink intensive tears protective eye drops have an advanced formulation that can hold moisture in the eye for over 60 minutes.eliminates the need for a separate enzymatic cleaner in many patients when used daily.the multi-dose blink intensive tears protective eye drops contain ocupure preservative technology, which dissipates into gentle, natural tear componentsthe viscosity-enhanced formulation of blink intensive tears protective eye drops can retain moisture and improve vision quality.packed in convenient unit dose vials. 20 x 0.4ml