Royalties Heir: Heinz Doofenshmirtz invented a device that corrects people's eyesight and the royalty checks he receives for this make him feel less uncomfortable about one of his inventions being used to do good.
Punctuated! For! Emphasis!: Candace replies, "I...don't...see...anything!" as she is hit by Doofenshmirtz's Eye Fog-inator and cannot see the Big Idea because her vision is blurred.