So, what are the things that pass unnoticed by us but are clear as day to dogs? Could it be colors, motion, or maybe something from beyond the physical world?

Dog Eyes See More Than Falling Fries

When it comes to senses, dogs are far ahead of humans. Their sense of smell and hearing are key to how they experience life, much more than they are for us. 

For us, sight is our dominant sense, but when comparing it to dogs, our eyes fall short in some areas.

We’ve touched on the colors dogs see, but vision is more than just colors. While humans see a wider range of shades, dogs excel in night vision and their ability to detect movement is unmatched.

Their knack for seeing in the dark and picking up on quick movements is part of what makes dogs natural protectors. 

It’s not surprising since they are predators by nature, so being able to hunt and guard comes naturally to them. This is why certain things, which may seem hidden to us, are just part of their regular vision. Let’s explore some of the fascinating things dogs can see that we can’t.

Seeing What We Can't: Ultraviolet Light

Ultraviolet light is one of those things dogs can see but we can’t. UV light comes in wavelengths between 100 and 400 nanometers. Human eyes only detect light between 380 and 700 nanometers, known as visible light [1].

Common things like fluoride in toothpaste and sunscreen give off UV light. Neon lights do too. According to Psychology Today, dogs can see these UV emissions that are invisible to us. 

This might explain why dogs are so eager to mark over another dog’s territory since urine also emits UV traces, making it easy for them to spot.

If you drink tonic water, your dog may be puzzled by the glow it gives off. That’s because it contains quinine, a substance that absorbs and emits UV light. Coincidentally, quinine is also used in malaria medication.

What’s even more fascinating is that dogs can see more stars in the night sky than we do. While they may not care about distant galaxies, they certainly have an edge in focusing on things closer to them.

Rod-Packed Eyes Make The Difference

The way dogs’ eyes are positioned gives them a wider field of vision than us. While humans can focus on finer details, we have to turn our heads more to see our surroundings, which isn’t the case for dogs.

With their eye placement, dogs can easily notice things happening on the sides. Movement, in particular, is easier for them to detect. This is where rods and cones, the light receptors in the eyes, play a big role. 

Dogs have more rods than humans, which helps them see in low light. Humans have three cones for seeing colors, while dogs only have two. This difference is why they don’t see the same range of colors we do.

Before we even realize something’s moved out of our peripheral vision, dogs have already figured out what it is. They are able to react much faster than we can because their field of vision is broader.

And those extra rods dogs have? They also make them more sensitive to movement. While we may be able to see finer details from far away, dogs will always notice things that move before we do.

When Dogs Seem To Bark At "Nothing"

If your dog is barking at what looks like nothing, it’s usually for a reason. Dogs don’t just bark at thin air. It might seem unsettling when they start barking at an empty spot, but it’s likely their other senses, not vision, that’s causing it.

It could be a person, animal, or object that’s caught their attention, producing sounds or scents that only dogs can detect.

So, if your dog starts focusing on a seemingly empty part of the room, they’ve probably detected a noise or smell we can’t. But what if you're out in a completely silent place?

Are Dogs Tapping Into The Paranormal?

Can dogs see ghosts or paranormal activity? Are they in touch with things beyond this world? It depends on what you believe. If you think ghosts, spirits, and other supernatural entities exist, you might believe dogs can sense them too.

References:

[1] NASA. (n.d.). Visible light. NASA. Retrieved March 23, 2023, from https://science.nasa.gov/ems/09_visiblelight