So, we ask, how do you know how long these poles should be as
they recede? I was taught, he says. Not by any formal teacher, but
by casual comments by friends and acquaintances. How do you know
about shadows? He learned that too. He confides that for a long time
he figured that if an object was red, its shadow would be red too.
“But I was told it wasn't,” he says. But how do you know about
red? He knows that there's an important visual quality to seen
objects called “colour” and that it varies from object to object.
He's memorised what has what colour and even which ones clash.
special: The art of seeing without sight
An artist who can draw complicated scenes upon request, despite the
rather small handicap of being blind—a very interesting article
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