Why aren't some dogs colour blind and some aren't?

Answer 1

When a man is tested in the military, or for a commercial driving license, the chart tests for color blindness. If he is deemed color blind, it means he can't see the colors of red and green, but only sees them as shades of brown..that is the human condition known as color blind.
However, dogs do not differentiate between red and green, so by human standards, yes, they ARE color blind.

But, some people think that the term means that color blindness is seeing only in black and white...dogs DO see other than black and white and shades of gray..so, they do see color.
They see yellow, blue, and tans/browns very well, and some shades of purple..but they don't differentiate red from green.

So, do they see color? YES
Are they color blind by human terms? YES
Do they only see black and white? NO
Here is a color chart to show how dogs see compared to humans..All dogs have 2 cones, (color receptors) and will see color the same..However, short nosed dogs see thing better close up than long nosed breeds, who see things far away better..

Answer 2

Since we obviously cant see through the eyes of a dog, we can only make an educated guess based on the dogs eye compared to ours. The back of the eye has photorecptors called rods and cones. The cones tranlate color. Since dogs do not have near as many cones as humans ( 6 to 7 million) we know that they see color, just not the same way we do.

Answer 3

LMAO!!!

They ALL are!!!

Where do folks GET some of this IDIOCY???

and...WHY does anybody CARE???

Answer 4

erm.. wat was the question