No, it is not in common usage. You would not be likely to hear anyone saying this on the street. It would be more likely found in dramatic literature than in a conversation in a cafe or bar. If you were to say this to someone, though, they would understand what you meant if you meant that someone was being deceived or was deceiving themselves and, at last, they can see the truth, as it is.
A common way of saying this in the USA would be: s/he "woke up" to reality. If I wanted to encourage you to see the truth of the situation, I might say, "Wake up and smell the coffee!"