That's terrible. I'm not a vet, but the eye is togher than you'd think it would be. It'll actually heal pretty quick. I think as long as the optic nerve doesn't get damaged. I'd look for cloudiness in a couple of weeks. In a day or so, I'd kinda test his vision on that side. Get so he can't see movement with good eye, and move your hand towards wounded eye, see if he notices or blinks if you move towards it. You could test it now, but keep in mind that there might be some blurriness and hopefully the vision will improve from what it is now.