Tag: eye sight

Can Cats See in the Dark?

Posted on February 14, 2025 - 4:43 pm by
A close-up of a gray cat with yellow eyes covered in shadow as it lies in the dark.

If you’re a cat parent, you’re probably used to things going bump in the night. A book knocked off the table, a ball rolling across the floor — normal nightly occurrences for a household with a kitty. All of these night moves may have you wondering how your cat can see in the dark. Do they have built-in night vision? Are they a superhero? We can’t be sure they’re not a superhero, but we can explain why cats can see better than humans at nighttime.

Do Cats Have Night Vision?

Cats do have built-in night vision to a degree. While they can’t see in complete darkness, they do have excellent night vision in very low-light environments, especially compared to humans. It’s likely that your house is never completely dark; streetlights, moonlight, the glow of the clock on appliances — all of these light sources help provide dim light for your indoor cat to see their way around your home.

Surprise! Cats Are Not Nocturnal

Your cat’s schedule of sleeping all day and playing rambunctiously through the night may have you thinking that they’re nocturnal. But domestic cats are actually crepuscular, meaning they are most active at dawn and dusk — their ancestors would have hunted prey at that time. However, your particular cat’s behavior may also depend on your lifestyle.

How Do Cat’s Eyes See in Dim Light?

There are a number of reasons why cat vision is better in low-light conditions compared to human vision. Cats have more rod photoreceptor cells in their retina than humans, which makes their retina more sensitive to low light and motion, and helps them perceive contrasts between light and shadow. On the flip side, human retinas have more cone photoreceptors, which are the light receptor cells that work best in bright light and are responsible for color perception.

If you’ve ever taken a photo of your cat with the flash on or spotted a cat in your headlights, you would have noticed that their eyes look like they’re glowing. This eerie glow is due to a layer of highly reflective cells located behind the retina called the tapetum lucidum. The tapetum lucidum works like a mirror to reflect light back to the retina, which gives rods and cones of the retina another chance to pick up the limited amount of light available at dawn, dusk and night. The glow you see in a cat’s eyes in the dark is a result of this reflective layer and how it interacts with incoming light (and not because they have superhero night vision).

Cats also have larger corneas and pupils than humans in relation to the size of their eyes, so more light can enter their eyes. That definitely works in your cat’s favor in dimly lit environments. A cat’s vertically slit pupils also respond better to how light enters the eyes than humans’ round pupils — they can expand wider at night and change the amount of light falling on the retina. More light entering the eyes helps them see better at night.

How Do Cats See Humans? How Do Cats See the World?

Cats have excellent depth perception, which is especially important for hunting, jumping and exploring their environment. Their binocular vision, where both eyes focus on the same object, enables them to judge distances accurately. They also have excellent peripheral vision. Cats possess approximately a 200-degree visual field, which is wider than a human’s 180-degree vision. This wider peripheral vision can help cats spot potential prey or threats more easily.

Cats have poorer visual acuity than the average human, which means their ability to see fine details is not as good. The typical explanation of this is that what humans can see at 100 to 200 feet, a cat needs to be 20 feet from them to see with the same clarity. But remember that cats don’t rely on their eyesight as much as we do. Smell and hearing come first, so a cat’s visual acuity isn’t as important.

What Do Cats See in the Dark?

Cats have fewer cones than humans, which means their color vision is different to humans — red, orange and brown look gray or muted to them. Even though cats mostly see in shades of blue, green and gray, this helps their vision in low-light conditions.

Cat Vision Excels in Low-Light Situations

Cats have very good night vision due to their eyes’ ability to let in more light than a human’s eyes can. People might be better at perceiving fine details and seeing more colors, but cats have us beat when it comes to seeing in low-light settings. However, both you and your cat would need night vision goggles if you were in total darkness!

When the Leaves Change Color, Can Your Pets See It?

Posted on October 22, 2020 - 3:00 pm by
Taste of the Wild

Autumn plays with all your senses, but none so much as your sense of sight, as deciduous trees burst into shades of brilliant red, vibrant orange and buttery yellow. This vivid array is enough to make you wonder: Does my dog or cat enjoy these colors like I do?

For decades, many people believed that dogs and cats were colorblind, or could only see shades of black, white and gray.  The truth is, they do see colors, but not in the way we do.

Your dog’s true colors

For people and pets, color perception begins at the retina, or the tissue lining the back of the eye. The retina contains two kinds of photoreceptor cells: rods, which perceive low and shifting light, and cones, which discern colors.

Humans have three kinds of cones, which can pick up red, blue and green wavelengths. Dogs only have two kinds of cones: those that are sensitive to blue and those that pick up yellow-green. That means dogs can’t see the full range of colors, or the richness or intensity, that humans do. Their world is essentially limited to shades of blue, yellow and gray.

Putting dogs to the test

To determine how dogs see colors, scientist Jay Neitz at the University of California, Santa Barbara, performed a unique test. Dogs were shown three panels of light, two of which were the same color. Dogs were rewarded with a treat when they touched their noses to the panel with the different color.

In this way, Neitz found the hues dogs could distinguish ranged from dark and light blue to dark and light yellow and shades of gray.

How about cats?

Cats, like humans, have three types of cones in their retinas but fewer cones overall. So they may see a similar range of colors that you do, but the colors tend to be less vibrant. Within that spectrum of colors, cats tend to see blue, violet, yellow and green better than red.

Seeing the light

While dogs and cats may have fewer cones than humans, they make up for it with more rods, helping them to see better in the dark than humans. Dogs can have up to three times the rods as humans, according to Alexandra Horowitz, author of Inside a Dog: What Dogs See, Smell and Know. Cats are even more suited to nocturnal wandering, with as many as eight times the rods as humans.

Dogs and cats can also see the type B ultraviolet (UVB) spectrum, meaning some colors, such as white, may fluoresce and be disturbing for animals.

Work with your pet’s color spectrum

How can you use this color knowledge to your advantage? First, understand that a red or orange toy may appear gray, brown or black to your pet, or just doesn’t “pop” from the environment like it does for you. A blue toy may capture your pet’s attention better.

If you want to create a soothing environment for your pet at home, again, work with your dog or cat’s visible spectrum. Choose wall paints, pillows and blankets in the blue, green or violet range of the spectrum, rather than oranges and reds. Avoid bright white when possible because it might light up or flare for your pet more than it does for you.

But what about all those red and orange leaves piled in your backyard? Your pet may not appreciate the colors, but he or she can certainly have fun leaping and rolling in all of them with you.