Just a day or so after having thought of Aristoteles and his strange view of the eye I happened to receive from the library 'Skywatchers', a book by Aveni. And there, to my astonishment, I read this comment about a picture of a Mayan astonomer: "Fig. 2, taken from the Madrid Codex, a Maya document written shortly before the conquest, reflects the central role of astronomy among the civilizations of Mesoamerica. It shows an astonomer observing the stars. Seated in his station, he seems to be plucking them out of the sky with his extended eyes. The skywatcher is surrounded by hieroglyphs and Maya numbers which presumably relate to his astronomical secrets."