The Ganzfeld effect
The Ganzfeld effect (from German for “complete field”) is a phenomenon of visual perception^[1] - apparent blindness. caused by staring at an undifferentiated and uniform field of color. The effect is described as the loss of vision as the brain cuts off the unchanging signal from the eyes. The result is "seeing black".

I tried the Ganzfeld experiment myself by using white plastic to cover my eyes, white noise and red screen from the laptop in pitchblack room. Very weird feeling experienced, because eyes don't have anywhere to focus and due to that there is nothing to send to the brain (as i understood it scienficly, if i'm correct) i found myself starting to see an abstract images/shapes/patterns. It lasted just until i blinked each time, but it was weird in the way how i found myself coming out of some sort of dream back into reality again trying to focus on something each time i blinked. Felt like i was meditating, or being completely disconnected from the world- because of the white noise repetition my mind started hearing some random music with people talk overlay. All i could see was very flashy images appearing from time to time of distorted shapes of some sort which i couldnt relate to any of the objects or faces, almost like hallucination, waving light coming from the sides and vision snaping back to whiteness trying to focus on something.
It was an interesting experience, reminded me of the same what you get if go to a completely blinded room, keep your eyes open and start to see a new vision.
The experiment gave me more depth in understanding J. Turrell's work and some starting point to think about my own project.