Most visual differences between humans and cats result from differences in photoreceptors. Cats have a field of view of 200 degrees, and the refresh rate of cat eyes is faster. They can see high-speed moving objects clearly, but they may see slow-moving objects stopping. Cats' night vision ability is also 6-8 times that of humans.

The biggest difference between human vision and cat vision is the retina, which is the inner layer of the eyeball wall and contains visual cells. The visual cells convert light into electrical signals, which are then processed by nerve cells and sent to the brain, so that we can see what the world looks like.

There are two types of photoreceptor cells, namely cones and rods. Cones are responsible for daylight perception and color vision. They have poor light sensitivity but high visual acuity. Rod cells are sensitive to dark light, so they have high light sensitivity, but poor resolution. Only rough outlines of objects can be seen in low light, and there is no color vision.

Cats have more rods and fewer cones. Humans are the exact opposite of cats, which is why we don't have as good night vision as cats, but our ability to distinguish colors is worse than cats.

Field of view:

We can see from the picture above that the cat's eye is more focused, almost reaching a 200-degree field of view, while the human field of view is only about 180 degrees.

Visual acuity:

Cats need to stand about 6-7 meters away from the target to see the object clearly, while humans can stand 30-50 meters away to see the general appearance of the object. This is why the world of the lower cat in the image above is so blurry.

Color Vision:

Some people mistakenly believe that cats cannot distinguish any color. They believe that cats can only see gray. Cats are actually similar to color blindness in us humans. They can distinguish green and blue, but they can barely distinguish red and pink. For example, purple is almost the same as blue in their eyes. The picture above is the summer in our eyes and the summer in its eyes.

Distance:

Cats are like myopia among us humans, they cannot see distant objects clearly. This ability may be better for them to capture prey at close range.

Night Vision:

Although the world in the eyes of cats is not as colorful as ours, God is fair and has given them a pair of eyes that can see objects clearly at night. This is because they have more rod cells and are very sensitive to light. The result is that cats need only one-sixth of the light that our human eyes require to see the world around them. There is also a layer of reflective pigment behind the cat’s retinalayer, which can help them improve their night vision. This layer of material acts like a mirror, reflecting the optical fiber passing through the rod cells and cone cells onto the photoreceptor cells, which is equivalent to giving the light a second chance and slightly improving the ability to see at night. The picture above is what it sees in our home in the square at night.