well i can do this in a room with no much light lets say a room with a nightlight . So in days that i cant no get sleep for some reason i just relax and start looking to any corner of my room and all what i see with the minutes passing by is the room getting darker and darker till is all dark but if i continue doingthis i start seeing like small electrical lights running to the walls of my room here is when i get king of scare and everything come to normal lololol is haed to explain but i use to do this alot when i was a kid and i was getting bored in my room at night at my age now 35 when i do this just a few times because my eyes get tired of doing this , is when i start seeing those electrical light running all over is kind of kool at first but then u just start gettting the felling of being scare weird huh .... well is not my goal right now to xplore that area of my eyes i think lololol but sure latter on much latter maybe i will to find out what it is