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Descripción Paperback. Condición: new. Paperback. In The Vision Revolution, Mark Changizi, prominent neuroscientist and vision expert, addresses four areas of human vision and provides explanations for why we have those particular abilities, complete with a number of full-color illustrations to demonstrate his conclusions and to engage the reader. Written for both the casual reader and the science buff hungry for new information, The Vision Revolution is a resource that dispels commonly believed perceptions about sight and offers answers drawn from the fields most recent research.Changizi focuses on four why questions:1. Why do we see in color?2. Why do our eyes face forward?3. Why do we see illusions?4. Why does reading come so naturally to us?Why Do We See in Color?It was commonly believed that color vision evolved to help our primitive ancestors identify ripe fruit. Changizi says we should look closer to home: ourselves. Human color vision evolved to give us greater insights into the mental states and health of other people. People who can see color changes in skin have an advantage over their color-blind counterparts; they can see when people are blushing with embarrassment, purple-faced with exertion or the reddening of rashes. Changizis research reveals that the cones in our eyes that allow us to see color are exquisitely designed exactly for seeing color changes in the skin. And its no coincidence that the primates with color vision are the ones with bare spots on their faces and other body parts; Changizi shows that the development of color vision in higher primates closely parallels the loss of facial hair, culminating in the near hairlessness and highly developed color vision of humans.Why Do Our Eyes Face Forward?Forward-facing eyes set us apart from most mammals, and there is much dispute as to why we have them. While some speculate that we evolved this feature to give us depth perception available through stereo vision, this type of vision only allows us to see short distances, and we already have other mechanisms that help us to estimate distance. Changizis research shows that with two forward-facing eyes, primates and humans have an x-ray ability. Specifically, were able to see through the cluttered leaves of the forest environment in which we evolved. This feature helps primates see their targets in a crowded, encroached environment. To see how this works, hold a finger in front of your eyes. Youll find that youre able to look through it, at what is beyond your finger. One of the most amazing feats of two forward-facing eyes? Our views arent blocked by our noses, beaks, etc.Why Do We See Illusions?We evolved to see moving objects, not where they are, but where they are going to be. Without this ability, we couldnt catch a ball because the brains ability to process visual information isnt fast enough to allow us to put our hands in the right place to intersect for a rapidly approaching baseball. If our brains simply created a perception of the way the world was at the time light hit the eye, then by the time that perception was elicitedwhich takes about a tenth of a second for the brain to dotime would have marched on, and the perception would be of the recent past, Changizi explains. Simply put, illusions occur when our brain is tricked into thinking that a stationary two-dimensional picture has an element that is moving. Our brains project the moving element into the future and, as a result, we dont see whats on the page, but what our brain thinks will be the case a fraction of a second into the future.Why Does Reading Come So Naturally to Us?We can read faster than we can hear, which is odd, considering that reading is relatively recent, and weve evolved to pr Shipping may be from multiple locations in the US or from the UK, depending on stock availability. Nº de ref. del artículo: 9781935251767
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