46 things we learned from the Game Of Thrones Blu-rays 

Daenerys and Viserys were originally shot with viola contact lenses. Showrunners David Benioff and Dan Weiss gave them the chop, though, after concluding that "actors act with their eyes, and [the lenses] really hurt the emotion."
parole chiavi: Game of Thrones, season 1, blu-ray