Our eyes are the main information input for most of us. They send immense amounts of data streaming into our brains all day, every day. So much of it, that our brain can’t possibly handle all, so it throws some of it away. And even the information that we do get from our eyes can’t always be trusted.
There are two phenomena that are particularly deceptive: change blindness and afterimages.
These two eye tricks occur for two different reasons, but they both result in us not being able to always trust what we see.
Change blindness is when we cannot find the differences in a scene when there was a discontinuity that interrupted our view of the scene. The image below is an example showing how change blindness can trick us. How many things can you count that change from before the gray to after the gray?
Now how... keep reading