The Nocturnal Hunters

Jun 15 , 2020

The Nocturnal Hunters

How do dogs see the world?

The dog's secret weapon as a predator is their ability to see in the dark. They are crepuscular, meaning they are active in twilight.

Dogs can see better because of their extra receptors. Their eyes contain photoreceptors that are made up of rods, which are light sensitive. The dominant rod is called the tapetum lucidum. It is a retroreflector that contributes to their night vision ability and focuses on what the dog is looking at. An animal’s ability to see in the dark is what we call Flicker Fusion Frequency. The faster a species moves through its environment, the higher its flicker fusion. However, this doesn’t mean that they are able to see in total darkness.

While humans can see well in bright light, dogs do well in both bright and dim settings. In fact, they can see in light 5 times dimmer than humans can. However, dogs are not able to focus as sharply as humans can. Additionally, humans have three types of cones called trichromat, while dogs only have two (dichromat). Our extra cones are the reason we see a variety of colors,which a dog cannot.

Dogs just see the world in yellows, blues, and grays.