Quote from Kramer in The Gymnast
Mr. Pitt: Oh, this is very odd. Kramer: Yeah, it's 3-D art. Computers generate it. Big computers. Mr. Pitt: Yes, I've heard about these. How do they work? Kramer: Well, you blur your eyes like you're staring straight through the picture. And you keep your eyes unfocused. And then... [both stare at the picture] Oh, oh, oh, yeah! Mr. Pitt: I don't see it. Kramer: Yeah, it's a spaceship, surrounded by planets, asteroids... Mr. Pitt: I still don't see it. Elaine: Okay, Kramer, that's enough. Mr. Pitt has got work to do. Kramer: You ever dream in 3-D? It's like the boogeyman is coming right at you. Mr. Pitt: A spaceship, where? Kramer: [pointing] Right in here. Just keep your eyes unfocused.