EyDidole used some prehistoric cultures of the old and new world, usually as amulet to protect against evil.
Usually these are facials on ceramics that have been demonstrated over many areas of the world and for a long time: Ceramics with eye representations, two eyes with emphasized brews and sometimes one nose; In Denmark, the early danes in BUNDSø style decorated around 3000 BC. Chr. Around a quarter of a millennium pots with eye idols; Eye motifs were sometimes found together with megalithic systems in other parts of Europe.
Elsewhere, it was continued with representation, naming and interpretation of the eye symbols : in ancient Egypt the Udjat eye of the God healed Horus and was also quite impressive: bit.ly/2bfpcp0 ; In Mesopotamia (Iraq), Tell Brak found a whole temple of Augen around 2800 BC. Chr. Made, beautifully abstract black and white alabaster figures with attached faces of eyes, brows and forehead lines (even then!), Sometimes two pairs of eyes or two heads on top of each other, sometimes eyes with crowns, sometimes clearly with eyes that showed the deities.
In Los Millares in Spanish, in the 3rd millennium BC Chr. Stylized idols of stone, bones or terracotta reduced to large round owl eyes; Around 1950-1800 BC in the Turkish Kültepe. Chr. Alabasteridole with bodies, three necks and faces almost only made of sore eyes; Cyprus made around 2000 BC BC Terracotta Brettidole with concentric circles as eyes.

In America the eyes were rain symbols ; The culture around the regularly drying Mississippi developed around 900 BC. Chr. Human head and face representations with fork or wing eyes that could become independent and often let the tears run (in the past not everything was better).
this worldwide use of the eye symbolism appears very obvious, point-point stroke actually does not need a huge effort in the creative part of the brain. So why do the eye symbols-almost at the same time-occur-almost at the same time-especially now when the first upright homo was no longer crawled around in Africa almost 2 million years ago and the Homo sapiens is already 200,000 years old?
Could the development of the high cultures be linked directly to brain development? Settlio, cultivation and storage, more security, more food and more brain for 12,000 years; And around 3000 BC BC, a few hundred generations later, does the "more of brain" shoot first flowers?
Without turning on the lengthy periods of brain development, these ideas have left: "What is obvious and is reasonable is also thought everywhere and prevails at some point" - a thought that some contemporaries in the 2nd decade of the 21st century.