just read degen and KMs descriptors. not sure if its what they experience. but it was a much more (100x maybe) intense version of what i feel when i have the blue light blocking filter built in by samsung on my S8 and im using it in a not so well lit room.
While mining, one of the cards was not tuned properly and i had a black terminal window up. and while it was only brief, the entire top area of my head experienced pain inside while i looked at the terminal window when i started the miner. then the machine crashed.
that black terminal window was only in one area of the screen. but i looked directly at it and it definitely wrecked me. i would have been shocked by that i think if i had not observed the writing on this forum. so just know more and more of the population is bound to become aware of such things.