Other blind people see a flashing shifting colorful mess in their field of vision. I know someone who can even mentally control the perception of the visual dis

Other blind people see a flashing shifting colorful mess in their field of vision. I know someone who can even mentally control the perception of the visual disruption to an extent, like making it flash different colors. The visual system from the eye to the brain and everything between is incredibly complex and can fail in all kinds of different ways.