You don’t normally experience the blind spot, because your brain continually fills in the void for you. The process is called perceptual interpolation. The blind spot, it’s worth noting, is much more than just a spot; it’s a substantial portion of your central field of vision. That’s quite remarkable—that a significant part of everything you “see” is actually imagined. Victorian naturalists sometimes cited this as additional proof of God’s beneficence, without evidently pausing to wonder why He had given us a faulty eye to begin with.
