Sight
Dogs were thought to be dichromats and thus, by human standards, color blind.[6][7] New research is now being explored that suggests that dogs may actually see some color, but not to the extent that humans do; color may serve as a subliminal signal helping to distinguish overlapping objects from each other, rather than a distinct feature that the dog can directly determine. It has also been suggested that dogs see in varieties of purple/violet and yellow shades. Because the lenses of dogs' eyes are flatter than humans', they cannot see as much detail; on the other hand, their eyes are more sensitive to light and motion than humans' eyes. Some breeds, particularly the best sighthounds, have a field of vision up to 270° (compared to 180° for humans), although broad-headed breeds with their eyes set forward have a much narrower field of vision, as low as 180°.[6]
2006-09-03 15:37:55
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answer #1
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answered by Anonymous
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Hope this helps,
The belief that dogs and cats are colour-blind probably arose from experiments in the early part of the 20th century. Researchers used food rewards (what else?) to determine whether cats or dogs could distinguish between, for example, a red can holding a treat and a grey can holding nothing. If, after a lengthy "training" period and numerous repetitions of the test, the animal's "winning" choices were no greater than the number that would occur with random guessing, it was taken as a sign that the animal was colour-blind. In these early tests, dogs and cats did not fare well. Hence the assumption that they could not distinguish colours, but only saw shades of grey. (Other tests showed that they did distinguish between different shades of grey.)
Later experiments revealed that cats could distinguish between colours after enough trial and error. It seems that the colour differences just weren't very important to them and they didn't want to learn them. (And it's hard to get a cat to do anything he doesn't want to do.)
Further tests on dogs showed that dogs can distinguish blue from yellow, but have trouble with the spectrum between red and green (including orange and yellow) — all of these colours seem to "blend together" for them.
Beyond empirical testing, actual eyes — human and animal — have been dissected and compared. We don't know exactly how our eyes work, but it seems that dog eyes are fairly similar to ours except they have two different types of cones (receptors) while humans have three types. (Colour-blind humans have two.) The current belief is that cats and dogs are not colour-blind, but they are colour-limited. Their colour perception is similar to what we see at twilight.
2006-09-03 22:41:28
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answer #2
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answered by Zsoka 4
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Im not sure, I have heard different stories from different people about dogs! Some say they just see in red and black and white, others say just black and white, and some say all the colors. But have you ever thought about this.... if you see something one way does everyone else too. Lyke if you see a tree as brown, so does everyone but your brown could be someone elses blue! Do you get it??? I really think that scientists should go into something like this!
If your confused email me at --- helpfulhints101@yahoo.com
2006-09-03 22:43:04
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answer #3
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answered by Helpful Hints 2
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yes they are color blind. Poor dogs.
2006-09-03 22:55:36
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answer #4
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answered by .:♥ Fire Within♥ :. 4
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i heard they only see in 2 colors...not sure if its only black and white tho...i heard it was red and some other color
2006-09-03 22:37:36
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answer #5
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answered by Anonymous
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are you color blind?
2006-09-03 23:30:07
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answer #6
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answered by Anonymous
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I've always heard they are? but how would u test that to find out?
2006-09-03 22:48:37
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answer #7
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answered by Eastcoast beachgirl 3
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ha thas a secret...they can even see beyond of what you sees...day light
2006-09-03 22:39:40
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answer #8
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answered by lins 4
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deer are
2006-09-03 22:37:16
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answer #9
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answered by rcc424 1
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