entoptics

entoptics

(ɛnˈtɒptɪks)
n
the study of entoptic visions
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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According to Lewis-Williams's theory, the enigmatic geometric shapes (entoptics) evident in prehistoric rock art throughout the world indicate the first stage of altered states of consciousness as the shaman prepares to enter the spiritual or supernatural world (Lewis-Williams & Dowson 1989: 6063).
In Nietzsche's terms, the rock art would presumably not be a mere representation of phenomena (although entoptics and hallucinations are also phenomena) but an attempt to express an ecstatic union with the universal will.
Rock art or Rorschach: Is there more to entoptics than meets the eye?