Your peripheral vision is part of your overall vision area, which is around 190 degrees. It’s far from perfect though, and sometimes it causes us to see things that really don’t exist. We found a cool way of proving that to you.
Everything you need to do is focus on the cross in the centre of the picture below, without looking away. You will notice how your peripheral vision turns the ordinary faces of people into those of ‘monsters.’
The faces continue to twist, right? And the longer we look at the image centre, the greater the distortion. Why is this happening? We’ll clarify it all step by step.
There’s one area of our retina called the yellow spot. It contains the largest number of eyeball receptors, thanks to which we can more clearly see a given area. Let’s call the principal field of vision in this area. It covers about 10 per cent of our entire vision range and shows what our eyes are directly focused on.
Our main field of vision, in this case, is empty; there is just one dark area with a white cross. The brain tries to take information from other sources outside the main field-the alternating images on the left and right in this case. Such sources are not really ‘reliable’ and the brain is attempting to incorporate them into one image. It is also trying to process the pictures in a very short time, as the pictures change very quickly. As a result, the ability to discern faces is lost, and the brain simply unites different characteristics from different faces into a single whole. We end up seeing ‘monsters’ because of this!