Unlock the Surprising Truth About How Dogs Really See the World—It’s Not What You Think!
- Cones, which function in bright light, are sensitive to different wavelengths of light (colors) and give the ability to see fine detail.
- Rods, which detect light levels (brightness or dimness) and motion.
Dog Vision Compared to Human Vision
Human eyes have three types of cones, each sensitive to different light wavelengths — red, green and blue. The combined activity of the red, green and blue cones in human eyes is what gives most people the ability to see a full color spectrum: red, orange, yellow, green, blue, indigo and violet. In contrast, dog eyes — like those of many other mammals — possess only two types of cones, those that are sensitive to blue and those that pick up yellow-green. This is called dichromatic vision. Human eyes typically have more cones than dog eyes, which suggests that a dog’s vision may not be as rich or intense as human color vision. Cats’ eyes also have fewer cones than humans, but cats can see some colors.
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