Gazu Hyakki Yagyō
They appear as a zatō (a kind of member of the blind persons' guild such as the tōdōza or a ranking of members of related groups such the Anma, moxibustion practitions, and members of the biwa hōshi, among other organizations) with both eyes not on the face, but on the palm of each hand. There is no explanatory text in the "Gazu Hyakki Yagyō" so there are no details that can be known from it.