August 2006
Intermediate to advanced
304 pages
8h 20m
English
WHY ARE WE BORN with two eyes?
One reason, of course, is redundancy: it’s good to have a backup, in case we lose an eye to an accident or illness. But there’s another consideration. Having two eyes is different from having, say, two kidneys, or two lungs. Having two eyes gives us the extraordinary ability to see the world in three dimensions. Yes, it’s certainly possible to get along in the world with only one eye—and many people do—but “binocular” vision gives us the enormous advantage of depth perception. When seen with two eyes rather than one, a formerly flat world acquires all kinds of useful complexity.
This is a book about seeing the world in three dimensions. More specifically, it’s about learning ...
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