Enhance the look of your natural lashes with Christian BRETON Eye Lash Builder, a primer & serum specially formulated to help lengthen & thicken the appearance of your eyelashes. Promoting noticeably thicker, intensified lashes, the formula features a spoolie applicator for easy use; apply in the day to prime lashes & protect against the drying effects of mascara, & use overnight as a serum to promote healthier, stronger, longer lashes. Enhancing volume & thickness, it will promote lush, lengthened lashes. It will also protect eyelashes from the damaging effects of the sun. Ophthalmologist tested.