A. As getting rid of dark circles under eyes is already a challenge, it would be difficult to get lasting results rapidly. There are daily challenges that impact the look of someone’s eyes – allergies, oxidative stress from environmental pollutants and personal lifestyle such as sleeping habits and nutrition. However, one can certainly benefit from using a retinol and/or caffeine based eye cream for an instant result. Applied topically, the caffeine ingredient such as the one in the ZO Hydrafirm Eye Brightening Repair Crème acts as a vasoconstrictor so minimizing the blood vessels which helps to reduce color showing through the skin and help to reduce puffiness. The retinol will eventually make an impact o the skin quality and help to reduce pigmentation. In the ZO Intense Eye Repair there are Optical diffusers that work to reduce look of dark circles and puffiness.