[Ford's not assuming it's the glasses. His guess is it was the impressions: the whole performance had been flawless, because it had to be. And he knows the impressions bother Bill.]

Okay, I'll get ones that're in the same shape.

[One, he likes the shape, and likes wearing the same thing for years. And two, he doesn't want to cause, you know, distress, which seems to be happening here.]

...but Bill, how is me changing my glasses that different from wearing a suit and tie?