in the face; on the face
Did he see her in the face?
Did you see him in the face?
Caro Garrone, basta guardarlo in viso una volta per prendergli affetto.
Dear Garrone, you only have to look at him once to grow fond of him.
Did you see him in person?
Il re lo guardò in viso e arrestò un momento lo sguardo sulle tre medaglie.
The king looked him in the face and let his gaze linger for a moment on the three medals.