Why couldn't he just put those glasses on when told/asked to?
And it also did not even remotely surprise Keith David's character that the guy fighting his wants say not his money or something else from him but to simply put on a pair of glasses that may perhaps also reveal something, and instead of doing it out of sheer curiosity, he just kept fighting the guy instead?
And also, why didn't the other guy maybe say more about the glasses during the fight than "Put these glasses on"?
Maybe Keith David's character thought those glasses had poison on them or something and the other guy was maybe simply trying to subdue him with them or cause his some other damage, no?