T-Rex: Hello, glasses store? I've got you on speakerphone. I would like to buy some glasses!
T-Rex: And as for my prescription...

T-Rex: ...NONE!!

Narrator: LATER:
T-Rex: This is gonna be great, Dromiceiomimus! I'm gonna be a GLASSES GUY. A guy who wears glasses!
Dromiceiomimus: But why?
T-Rex: Uh... STRATEGIC ADVANTAGE in CONVERSATIONS??

Utahraptor: You're gonna have to walk me through that one.
T-Rex: Happily!

T-Rex: You can take glasses off and clean them - buying you VALUABLE SECONDS to respond that non-glasses guys don't have! Plus, you can whip them off as a form of punctuation - and even point with them to REALLY underline what you're saying! This grants access to levels of rhetoric beyond my wildest dreams!!

Off panel: You have pretty tame dreams.
T-Rex: Man, I know it! Everyone ELSE gets to dream of skydiving or whatever, and I'm always stuck dreaming of doing some menial task to no result!
T-Rex: Anyway, glasses!!