Sangeetha Pulapaka

It's been a fact for many years that dogs only see in black and white. I'm here to tell you it's a total myth. Dogs can actually see colors that are equivalent to red-green color blindness in humans. If you were to compare the vision of a human vs. a dog, the dog would win the contest for noticing the most in its surroundings because a dog has much better vision for catching motion, however, dogs can only see about half the brightness level than their human counterparts. 

As twilight hunters, they have a section of their eye called the tapetum lucidum, which gives them something like night vision. You can often see the tapetum by shining a light into a dog's eye. It's that reflective eye-shine you can see when light reflects in their eyes in the dark. Dogs don't have the greatest clarity of vision, but they can see motion much better than us humans. For example, dogs have been shown to be able to differentiate between their owners from distances of up to 900m. However, that's only the case if you are moving. If you were to stay in one place, the distance they can differentiate goes down to around 500m. Some researchers believe that dogs may see television as a flickering screen. The visual abilities of a dog varies by breed. Greyhounds have been touted as having the best eyesight compared to other breeds, however, it hasn't been thoroughly proven.