The association of the human eye with mirrors was so strong that stylized eyes were often used in Teotihuacan - art as a substitute for the face of a mirror . The association of the human eye with mirrors was so strong that stylised eyes were frequently used in Teotihuacan art as a substitute for the face of a mirror . The association of the stylized eye with mirrors was so strong that in the Teotihuacan art , human eyes were often used as a substitute for the face of a mirror .