Seems from this thread that they don't seem to work for everyone. But a friend of mine is Red/Green colour blind and recently got a pair. We went for a walk in

Seems from this thread that they don't seem to work for everyone. But a friend of mine is Red/Green colour blind and recently got a pair. We went for a walk in the countryside and he was still (a couple of weeks later) excitedly pointing out how many different colours were in the field. It wasn't quite the viral marketting thing, but I was surprised and impressed by how much difference they seemed to make to him. I guess it's quite person specific though.