Hi, I've been taking Lutein and Bilberry (in the same supplement) pretty regularly for almost a year now with no adverse effects at all. The brand I prefer is by Solary. I actually have mild Blepharitis myself but that's not why I started taking it! I actually hadn't researched any supplements for that condition.

On a side note re: Blepharitis and making sure the margins are clean, I use a product called "Eye Scrub" several times a week. It comes as pads so it works really well in place of an eye makeup remover.