What does Paul tell his father about eyesight?

From the text:

"I guess it's about your eyesight, Dad. Your eyesight, and Coach Warner's, and Mr. Bridges's, and everybody else's who's 'shocked' today. Because I've seen lots of those Lake Windsor guys in lots of places. Everywhere we go, in fact. But I've never seen Antoine Thomas. I've never seen him anywhere except at the football stadium. That's because he doesn't live around here, Dad. He lives in Tangerine. Everybody knows that."

Note, Paul is telling his father that "adults", namely those who were shocked, didn't "see" anything they chose not to see. They didn't pay attention.