The Graeae

In Greek mythology, the Gracae, were three sisters of the Gorgon. They had but one eye and one tooth among them. These were shared and the sisters took turns in using them. By stealing their eye while they were passing it between them, Perseus forced them to tell the whereabouts of their sister, Medusa, ransoming the seeing eye for the information.

The three Gracae were featured in the story of "Perseus and the Gorgon".