This video will probably erode all trust you have in your eyes for the foreseeable future.
The AsapSCIENCE YouTube channel has uploaded a clip showing how our eyes deceive us – and has had more than one million views in just over 24 hours.
It tells you to close your left eye and look at the cross on the left of the screen.
If you move your head towards and away from your screen, you’ll notice that the circle disappears at some point.
The video explains why this happens:
The cells at the back of your eye transform light into signals that are sent to your brain, but they’re missing right here (below) because this is where nerves and blood vessels connect to the eye. So anything at that point in your vision you can’t see, aka your blind spot.
The video then gives a few examples of how our eyes can deceive us by missing things, like this example where we don’t see all the black dots:
Our eyes and brain have evolved to see but our vision makes assumptions based on learning, memory and expectation.
It's an advantage to have rapid information processing, so instead of taking in every bit of detail to be 100 per cent accurate, which would cause a brain overload, your brain makes assumptions. This faster perception allows for faster reflexes and faster conscious and unconscious decisions; an integral aspect of human nature.