Opti Crystals Eye Serum aka Unicorn Tears, contains 99% liquid crystals! A celebrity favorite (and our's too) this deeply hydrating serum radically reduces the appearance of dark circles, crows feet and fine lines. How To Use: Apply after cleansing and before serums etc, to dry skin using a pea sized amount. Warm up product between index fingers before application. Massage all over eye area using gentle movements and tapping product into the skin.