The fortune teller said that he had opened his eyes. Can you believe it?

You can ask him what are the characteristics of opening his eyes.

Opening your eyes is not easy to verify unless you also open your eyes.

But most people will open their eyes to the naked eye first and then open their eyes. You can tell him the address of your school or company and ask him to describe several distinctive signs inside your school or company. If he can say it accurately, he may open his eyes, otherwise it is nonsense.