For further information about the headdress of the Moon Goddess, see Aztec Moon Disk in the Aztec Center. This square eyes are a part of the message on the Mayan Izapa Stela 25. The art work was then done by the Peruvians. Sailors do not tend to be sculptors of clumsy stone work. . . They did not mind lugging gold or gems though.
Local artists draw their own version of whatever they feel is important.