When I try to sleep, regularly I will feel as though lights are shining on my eyes.
It can range from it seeming like the light in the hall is creeping through the door, to feeling like someone is shining a torch in my eyes.
I can feel my pupils change to adjust to it.
I think it started when I used to sleep with my laptop on sleep, and it used to flash in the dark, and I noticed I could sense when it was flashing with my eyes closed, and I'd open them when I thought the light was on and it was off, and it would come on momentarily after.
It's weird and sometimes annoying, but it's cool. I call it 'the light show', lol.