The ref has to see the poke and award that break or be alerted to it and decide to award it. He should have circled away and try to get the break what he did was declare he couldn't fight.
He said he couldn't see. Not he couldn't fight. It's the referees job to clarify whether that means he can continue to fight or not. He didn't do that. He ended the fight immediately like an idiot.
Although, I will give it to you that Villante screwed up by taking a knee.