Christian Breton's Dark Under eye corrector Serum is for those of us with dark circles under our eyes. This product visibly reduces the appearance of dark spots and circles under the eyes. You only need to use a pea size amount for both eyes. I find it goes on quite thick and is hard to use under makeup so I only use it at night. I noticed a difference on the colour underneath my eyes after about 4 days, it does not reduce puffiness but definitely colour corrects. The product is expensive, but it you want to try something that actually works, this product is great.