“Colorblindness” does not mean unable to see all colors

“Colorblindness” does not mean unable to see all colors, just *some* colors, thus as a result of having only two types of cone photoreceptors in their eyes, dogs have the equivalent of deuteranopia (red–green colorblindness) so that they see the color red as the color of yellow, and the color green as the color of white. Despite a limited perception of colors, however, they are able to actually better-see moving objects and objects in low-light conditions than humans can. In short, unless there is also a red house here, these dogs actually *should* be able to see the yellow house to make the turn at, despite being colorblind!

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