Personality glasses are usually either thin and stylish to make the wearer look classy, or are way too thick and out there in order to make the wearer seem edgy and interesting.
Person 1: Wow, those are such cute glasses! I wonder where she got them.
Person 2: She doesn't actually need those.
Person 1: Ohhh, they're personality glasses.
Person 1: Look at that tool, those are obviously personality glasses.
Person 2: Yeah, you can tell by the way they don't actually have glass.