Many people choose to share their life with a pet, and cats are one of the most common species. These felines are very popular, providing companionship and affection while generally being independent creatures, but interestingly, they fit into the lifestyles of humans, but they see it very differently from us.
In many cases, one can wonder how these animals perceive the world. In order to satisfy this curiosity, in this article we will review the conclusions reached by various experts. on night and day vision of cats.
Vision is one of the most developed senses in human beings. While in other animal species this sense is not as important as it is for a human due to the great development of hearing and smell, it remains an important tool for fixing and locating stimuli with precision. relative.
But cats they present some peculiarities to the eye if we compare it to that of a human. They have a much greater number of rods, receptors that perceive light and are also related to the perception of movement, while their cones are not as efficient as ours and appreciate less pigment. In addition, these rods make connections between themselves and create small knots before connecting to the optic nerve.
Another special feature of the cat’s eye is that after the retina, they have a layer of reflective cells called tapetum lucidum, which makes it easier to capture any available light. It is also interesting to note that they have a great capacity for pupillary dilation, which on the one hand allows them to better capture light in the dark but on the other hand they have to make efforts to focus the image in bright light conditions.
They also have an inner third eyelid which keeps the eyes lubricated, which is why it is not so common to see them blink.
Features of a cat’s vision
We were able to see that a cat’s eye, although resembling that of a human in some respects, has certain differences that allow it to have a different visual capacity. Some of the differences that have been noted in the various surveys conducted are as follows.
1. A visual field larger than humans
Research by several authors shows that a cat’s visual field is wider than what a human can capture. While the human being has a 180 ° vision, cats appreciate the chance to see at 200 °.
2. Night vision
Domestic cats have, on average, a much greater number of rods or photoreceptors than humans. This makes that next to the tapetum lucidum mentioned above, they are able to see in the half-light or in the dark, concretely up to 8 times better than us.
3. Perception of movement
A cat’s eyes are very good at distinguishing movements, especially when facing small or fast objects. However, it has been observed that they have trouble perceiving very slow movements, To be for them something almost static.
4. Color perception
There is the popular legend that cats and dogs are blind in color, being able to see only in black and white. Research reflects the opposite; the cats they can see in color. However, they are dichromatic and have no pigment allowing them to see the color red. That way, like us, they can see blue and green. His vision of color would then be similar to that of a color blind human with protanopia.
In situations of twilight or darkness, the cat’s vision is clearly superior, being able to see with great ease. However, during the day cats’ vision is not so goodAnd we have seen that under very mild circumstances their rods are activated in such a dimension that they are not quite able to determine which are stimulated. Thus, the sharpness of the feline vision is less, causing them to see the images somewhat blurry.
6. Neither near nor far
In general, the characteristics of cats’ eyes, size and location in the body result in cats having an optimal field of vision of between three and six meters. Before three meters, they usually have some level of hyperopia, While beyond six years, there may be mild myopia.