In an old house I used to live in when I was younger the room I was in had these really heavy curtains that stopped all light getting in the room from outside.
When all lights were off in the room and the hall light was off so no light came in under the door the bedroom would be pitch black.
Couldnt tell the difference in visual between having your eyes closed or open.
I woke up once in the middle of the night in a bit of a panic from a nightmare and then couldn't get myself out of the room. I spent 5 to 10 minutes shuffling my hands along the wall by my bed blind, trying to find the door handle or light switch. Proper freaky when I think of how helpless I was trying to rely only on the memory of my room outlay and where I thought I was in the room.
I can't recall how I got out now. Whether I just luckily found the door handle or if someone turned a light on outside allowing me to find it.
