Has everyone ever used a red eye remover pen or marker?

I have photos that I forgot to remove the red eye, and I really want to avoid having to reprint them all. Has anyone ever used these red eye remover pens? And do they work?|||Back when I worked at a 1 hr photo place years and years ago, we used them a lot. They worked pretty well in most cases. I'm sure that they've gotten more effect since I used them last.