What is the verbal, situation and dramatic irony of The Cay chapters 7-12

Situational irony results when things happen in precisely the way we didn't expect them to.

The issue of Phillip's vision causes some situational irony: the only time he literally sees Timothy clearly is when he fails to "see" him as the kind man he is instead of an untrustworthy black man, which he isn't. And then Phillip goes literally blind and only then learns to "see" Timothy correctly.