#14 Dogs And Cats Are Oblivious To Colour
Our feline and canine friends actually have a far better vision than ours. They see in the shades of blue and green. Also, their vision works fine in poor lighting conditions since there are more rods in their eyes.
What really makes a difference is how they perceive colours. For instance, hues of red may appear more greenish to cats and purple may appear more towards the blueish tone.
Dogs, on the other hand, have a drab vision as compared to humans because they have fewer cones – the photoreceptor cells responsible for coloured vision. As a result, dogs have a vision which is as good as 1/7th of that in humans.