The news that he would go blind was a possibility that had never crossed his mind. He slumped back into his chair, but before he had a chance to process it, much less ask how it happened, Bill continued on with trading the planet for... "Me? You trade the Earth for me?" He wasn't as angry as much as he was confused. "You're going to need to give me more detail than this. And what does regeneration have to do with it?"