Considering that the video was from 2008 and I haven't heard anything about the Iro Eye Drops before, I highly doubt they work. If they did work, they would have been groundbreaking and super popular. I don't trust them, I don't know.
I don't know how I feel about that. I mean the iris is a muscle and it's constantly producing the chemical to create your eye color. So in my head, if whatever this is can change your eye color that dramatically, then something can definitely go wrong. Something like damaging the muscle or ending up with some weird, swamp-coloured eye.
A volte deragliare il treno del pensiero non è una brutta cosa.