TUNEMAKERS Undiluted Eye Serum, 15mlThis eye serum is made from a blend of undiluted liquids. It penetrates deep into the stratum corneum, leaving skin feeling plump and firm. Our developers, who are most familiar with the properties of undiluted liquids, carefully selected five undiluted liquids to address eye concerns (lack of firmness, dullness, dryness), and formulated them in a unique "eye care ratio." Retinol [5]: Vitamin C derivative [3]: Vitamin E derivative [3]: Ceramide [2]: