Can you see “nothing”?

  Is it possible to see absolutely nothing?
   This question has been explored before. In the 1920s, a psychologist named Wolfgang Meser did an experiment to see if your eyes stopped working if there was nothing to see.
   Mezer kept volunteers in rooms that were carefully lit so that there were no shadows or shading, and the walls were immaculate on all four sides.
   After a few minutes in this setting, volunteers reported that “clouds” and darkness had come upon their sight; some felt terrified, as if they were about to lose their sight; others were convinced that there was Dark shapes hovered, and they tried to reach out to catch them.
   It was later discovered that if the room was lit in one bright color, after a few minutes the room would appear to be a dull gray, even a bright red or green would appear to turn to gray.
   Obviously, the eye can’t help but see, and when faced with darkness, it slowly and automatically stops working.
   You can simulate an experiment like this at home: Cut a ping pong ball in half and cover your eyes lightly. Since you can’t focus so close, your eyes can’t capture any detail; if you sit in an evenly lit place, within a few minutes, you start to feel what the people in the experiment felt like.
   By the way, if you close your eyes, this experiment doesn’t make sense. The slight pressure of the eyelid against the cornea and the tiny twitching of the eye muscles can create an illusion called endoscopic vision, which gives you something to see.
   Here’s another way of looking at nothing, which I myself prefer, and that is trying to see clearly when it’s pitch black.
   In the city where I live, it is impossible to find a place that is completely dark. In our apartment we have a bathroom that leads to an interior hallway, and even if I draw all the curtains, close the hallway, and close myself in the bathroom, the light still comes in from under the door. At first, I didn’t see the light, but after 10 minutes, my eyes caught the shimmer.
   True darkness is hard to find.
   When the eye has nothing to see, the eye and brain create all kinds of light.
   In complete darkness, what is displayed inside the eye is as bright as day, only to slowly dim after a few minutes. If I try to focus on some invisible object—such as my own hand held up in front of me—then my field of vision starts to flicker with chaotic black streaks.
   It’s a sign that my neurons are struggling to process signals that don’t exist.
   So I still have this strange thought: even if we ignore so many things, almost blind to what’s under our noses, our eyes don’t stop looking, even when we have to create a world out of nothing in this way.
   Perhaps it is only when our brains are blank, that is, in the time that passes between our dreams and dreams, that we don’t really see anything. Perhaps, death is the only name for true blindsight.