I use UDPP to prime my eyelids, and I prolly won't deviate from that, because it works for me, but I've never used anything to prime my under eye area for concealer. I don't know that it's really necessary, but my under eye area is so dry (even with application of eye cream twice a day) that even most liquid concealers go on a bit cakey, and dry down to emphasize lines.
|Clarins Instant Light Eye Perfecting Base - it's a pen.|
|Ingredient panel: click for larger.|
So, does it work? Well, it's definitely light and brightens my skin considerably. Sometimes I layer concealer over it, and sometimes I don't. Sometimes I try it under foundation, and sometimes I try it over foundation. Regardless of the exact method/ordering of products, I don't feel like it does a lot to keep my under eye area moisturized - the lines and milia there are still emphasized by any additional concealer and even this itself. It does brighten the area a bit, though, which is nice, and the brush is gentle enough not to drag at the skin. It doesn't seem to last very long without a concealer though, and that's prolly because it is intended as just a base. I don't know that I really need another eye shadow primer, though - UDPP Eden and Greed are more go-tos, and they are excellent.
Would I repurchase? No. I think I just need to find a new concealer with more moisturizing power, as I haven't seen too many under eye base type products. I may try some MAC ones. Any suggestions?