Just another WordPress.com site. Entoptic Imagery and Altered States. Entoptic images are visual effects which originate within the visual processing system of the observer.
The term ‘entoptic’ comes from the Greek for ‘within vision’, indicating that the images come from anywhere within the optic system, between the eye itself and the neural cortex where signals from the optic nerve are interpreted. Since it originates within the visual system, entoptic imagery can only be seen by the observer. For clarity, I would like to include a quick note on the definition of entoptic imagery. In their discussion of paleolithic cave imagery, Lewis-Williams and Dowson define entoptic imagery as visual experiences arising from anywhere within the optic system, which includes the eyes, the occipital lobe of the brain, and the many other portions of the neural cortex that process visual stimuli.
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