Accepted Answer
I think you must be referring to the fact that our eyes invert the image, so that the image on the retina is upside-down, and that worries you.The answer is: It's all easily handled by that glob of gray stuff inside our head.The brain takes the inverted image, and responds to it as if it were right-side-up. That sounds complicated and difficult, because we have no idea how terrificour brain really is. So let me tell you this story, and it'll blow your mind: When psychologists realized that the brain was turning everything we seeright-side-up, they did an experiment. They had some special glasses made, that would turn everything upside-down before it went into the eyes, so thatthe image on the retina would be right-side-up, and the person would seeeverything upside-down. Then they had some people try to go through theirnormal activities with these glasses on. Want to know what happened ?The test subjects were pretty awkward at first, tripping over things and bumping into walls. But after a few days, their brain made the adjustment,and they didn't notice anything strange any more. They could read books, wash the dishes, play ball, and most of them were even able to ride bicycles around their neighborhood in the normal way ! Then, when the experimentwas over, they took the glasses off, and they were awkward again for a fewdays, and then their brains flipped everything over again and they gotre-adjusted to normal. THAT's how clever our brain is !
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