Perception is everything

Imagine climbing to the top of a mountain and standing at the peak looking out at the view and your friend is with you looking out at the same scene. You look out and see a quiet, peaceful and beautiful world. Birds flying over the still entrancing water, mountainous terrain reflected in the water. Your friend looks out at the exact same view but they see a busy world, cars driving along the highway and people the size of ants moving about, playing outside. Both you and your friend are looking at the same thing but your perception of what you see is different. You may percieve the world as a serene and silent place but your friend sees it as loud and full of life. In Beau Otto's presentation on optical illusions he talks about how what we percieve may not be real. Beau Otto shows examples of his theory by holding up certain colours behind translucent paper and asking the audience what colour they see. Half of the audience will say one colour and the other half will say another. Our eyes have been trained to see colours in a certain way but when we look at colours in a different way, like through an optical illusion, they get confused and use the colour that is most often seen used on that object. So maybe my red isnt the same as your red, maybe what I see as red could be what you see as green. Who's to say which perception is right? Yours or mine? What Beau Otto means by "what we see may not be real" is that the way one person sees something to be isn't necessarily the same as way another person sees something to be. If everyones perception on something is different, then how can we be sure whats real?