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The Vision Revolution: How the Latest Research Overturns Everything We Thought We Knew About Human Vision

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Author: Mark Changizi
Publisher: BenBella Books
Category: Book

List Price: ~~$24.95~~
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Media: Hardcover
Edition: 1
Pages: 240
Number Of Items: 1
Shipping Weight (lbs): 1.1
Dimensions (in): 9 x 6.2 x 1

ISBN: 1933771666
Dewey Decimal Number: 576
EAN: 9781933771663
ASIN: 1933771666

Publication Date: June 2, 2009
Availability: Usually ships in 24 hours

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•	ISBN13: 9781933771663
•	Condition: NEW
•	Notes: Brand New from Publisher. No Remainder Mark.
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Editorial Reviews:

Product Description
Primates evolved binocular vision (both eyes facing forward) so that they can see in three dimensions, critical as they jumped from branch to branch. Higher primates developed color vision to better hunt out ripe fruit. Optical illusions succeed because they exploit the limitations of our visual processing. Wrong!

All of these beliefs are false, as groundbreaking research by evolutionary scientist and neurobiologist Mark Changizi now reveals. Changizi's research centers on the "why" of human vision. Why do we have binocular vision? Why do we see in color the way we do? Why do optical illusions work? And why are we able to absorb information by reading―a very new invention from an evolutionary perspective―more readily than by hearing, which we've evolved to do over hundreds of thousands of years?

The Vision Revolution answers these questions, and proves, with the detailed results of Changizi's fieldwork, that the answers are very different than traditionally believed. A radically new perspective of human vision is now emerging. The Vision Revolution is upon us.

Customer Reviews:

Showing reviews 1-5 of 7

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Magic Eye, Indeed!! September 18, 2009
CUCHO (LA)
2 out of 2 found this review helpful

Changizi has a light & amusing style, so that one might at first, undervalue him. But noting the citations & reference, plus doing the exercises he mentions, show one that the eye-ball is even more magical than one has ever imagined.

5 out of 5 stars

From Evolution to Abstraction July 24, 2009
PK (New York, NY USA)
2 out of 2 found this review helpful

Mark Changizi's application of evolutionary biology to the analysis of vision is brilliant and provocative. As an art historian, I am particularly interested in the chapters on "Color Telepathy" and "Spirit-Reading." Of course, color is a central concern in art history, but I was also fascinated by Changizi's argument for the centrality of flesh color to our perception of color in general. It recalls a passage from the Romantic critic William Hazlitt's essay, "On Gusto," about the variegated flesh color in Titian. Analyzing flesh color in real life, Changizi points out how much it changes from moment to moment, depending on blood, oxygenation level, and emotional states, notwithstanding the fixed amount of pigmentation.

His discussion of contours and combinations of contours as models for written signs is equally fascinating. Here, he sets off speculation about two issues. Is the basic repertory of signs for contours related in any way to the neural wiring of the retina and the brain, which preferentially recognizes certain shapes and alignments: horizontals, verticals, diagonals (as per the pioneering research of David Hubell & Margaret Livingstone)? And could this "machine code," so to speak, of vision be related to abstract forms in art? This last question is of particular interest in relation to Cubism and abstract painting. Perhaps their basic vocabulary is in some way related to the "natural" structure of vision.

A book that constantly provokes new reflections, not just about vision, but about life and culture.

5 out of 5 stars

Changizi is a genius, but this book is not for everyone July 21, 2009
algo41 (cinnaminson, nj United States)
1 out of 1 found this review helpful

Changizi is undoubtedly a genius, and he writes well, being particularly adept at analogies. Still, Changizi is detailing all the evidence for his conclusions, and some of it is not very interesting.

The most unintuitive conclusion is that our eyes have evolved to detect small variations in flesh color. Yet Changizi is very convincing, particularly because of Figures 14 and 15, which show that 2 of our color cones detect almost the same wavelengths, specifically the wavelengths needed for detecting small variations in flesh color! It is not clear whether this adaptation is primarily for detecting illness, or a person's true emotion, but I would have to go with the latter, and therefore this finding supports those evolutionists who emphasize social interaction as a primary driver in human evolution.

5 out of 5 stars

Outstanding scientific yet understandable book about human vision July 5, 2009
Charles Ashbacher (Marion, Iowa United States(cashbacher@yahoo.com))
10 out of 10 found this review helpful

If you were to do nothing more than glance at the chapter names, you would consider this book to be a collection of occult dung powder. Old, stale, and reworked so often that it is dried up. The chapter titles are:

*) Color telepathy
*) X-ray vision
*) Future-seeing
*) Spirit-reading

However, that first impression would be a significantly wrong impression, Changizi has written such a fascinating and scientifically sound book that it remains interesting, even when you disagree with his conclusions.
The chapter "Color telepathy" describes how humans are often able to "read" a person's thoughts and diagnose the state of their health by interpreting slight changes in skin color due to the level of oxygenation in the blood. In this area, his reasoning is sound and Changizi points out that colorblind doctors have been demonstrated to be at a significant disadvantage when attempting to visually diagnose a patient. Where his reasoning breaks down is when he argues that Homo sapiens evolutionarily acquired color vision so that they could use changes in skin color to learn what other people were thinking. In my opinion, this position is untenable.
In general, predators try to blend into the environment as much as possible so that they can get as close as possible before they move in for the kill. Having an acute sense of color vision would allow the relatively defenseless human to spot the stalking predator much earlier than if they were colorblind. Although Changizi's position has some merit, the value of color vision in spotting predators is a much stronger argument for it being evolutionarily selected.
The chapter "X-ray vision" has nothing like the powers of Superman to see through solid objects, the point is quite different. In this context x-ray vision is a consequence of having two eyes with some distance of separation between them, allowing for the brain to receive two offset images. A consequence is that if a sufficiently slim object obstructs your view, while one eye may not be able to see a segment of the visual field, the other eye can, allowing you to "see through" the object. Changizi also convincingly argues why humans and other creatures evolutionarily kept both eyes pointing forward, gaining stereovision when looking forward while losing some ability to see behind them.
Chapter 3, "Future-seeing" is not ESP-style precognition but the processing similar to what we do when we catch a ball. As we prepare for the catch, our minds generate a prediction where the ball will be when it arrives, in other words we must compute the future position of the object. Several years ago, I read a book about baseball where it was stated that when a baseball is pitched at 90 miles per hour, it is physically impossible for the human eye to follow the trajectory for the last several feet. To hit the ball the batter must compute the best estimate as to where the ball will be when it crosses home plate.
In chapter four, "Spirit-reading", the author describes the role of written language, how it was developed and how it is used by the dead or otherwise distant to communicate detailed information to others. Once again, Changizi's analysis is sound; his description of minimal strokes and more complex ideograms as methods of communication was easy to follow and convincing.
It is clear that Changizi is an expert on the concept of how humans use vision to understand their literal place in the world and cope with the dynamic nature of their environment. As optical illusions demonstrate, human vision is a very complex apparatus and in this book Changizi clarifies a great deal in language that is accessible to everyone.

5 out of 5 stars

An entertaining book June 17, 2009
Dimitri
5 out of 7 found this review helpful

An easy to read book for the scientist or lay reader.It informs and encourages us to speculate on human perception evolution with very
interesting illustrations.

Showing reviews 1-5 of 7

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