What it is: A featherweight emulsion that creates the illusion of a brighter and more luminous eye area. What it does: When applied daily, this serum-and-primer formula leaves the skin around your eyes with a more rested, smoothed appearance that's perfect for following with your makeup. It can be worn alone for an illuminated glow or underneath your makeup as an eye primer. How to use: Pat a thin layer of serum in crescent shapes above and below