Thanks your comment! Our character lost their glasses, so they look at the world through the phone's camera. When they take a photo, they see it's real and get scared, which fills the fear bar. The ghosts disappearing is just a mechanic; there's no deeper reason for it. (The part not added as a mechanic: normally, we solved puzzles by putting on and taking off glasses to find a key, but i ran out of time, so i ended up doing everything with the phone.