The pigments we use in our lenses are FDA approved medical grade dyes. Our products are manufactured under strict compliance with KFDA and USA FDA regulations. Proprietary Special Invert Padding Technology prevents surface protrusion on the lens, and keeps the eye safe from the colors. Our special design provides unparalleled user comfort, greater centration and premium optics. Worn as directed, clearcolor® lenses provide the safest, most enthralling cosmetic lens experience available on the market.