If you dropped a bag over his head, the focus of his eyes would probably remain the same. A person in chronic grief tends to focus his eyes down in the direction of the floor a good bit. In the lower ranges of grief, his attention will be fairly fixed, as in apathy. As he starts moving up into the fear band, you get the focus shifting around, but still directed downward. At fear itself, the very obvious characteristic is that the person can't look at you.
People are too dangerous to look at.
He's supposedly talking to you, but he's looking over in left field. Flick, flick, flick. In short, he'll look anywhere but at you. What a person does with his eyes can help you spot his position on the Tone Scale. Then, in the lower band of anger, he will look away from you, deliberately.