We owe to Plato the definition of sight as “the clearest of the senses one possesses, shining with a superior clarity” and the representation of the eyes, which are the external declaration of sight, as mirrors of the soul, capable, like no other vital organ, to reflect human emotions and to act at the same time as acute tools for investigating the external world. Pliny the Elder, too, stated that “profecto in oculis animus habitat” (certainly the soul lives in the eyes) and “it is evident that even in animals, but more so in man, no other part of the body indicates the state better than these sense organs.” Due to the charm they have always exercised on man, eyes are widely represented in the figurative arts and they are often entrusted with the task of communicating the very essence of the human being and his passions: they can express happiness, melancholy or restlessness and at the same time, they can send glances capable of investigating, healing and protecting, encouraging, rebuking or reassuring.