Night cat’s eyes – what color are cat’s eyes at night?

       What you see on the Internet is correct, but there are two factors to add:

       

       2. The existence of the reflective pigment layer in the choroid of the cat makes the light that the cat feels through the retina can reach the retina again through the reflective pigment membrane, so that the cat can amplify about 40 times the weak light at night.

       Due to the existence of the reflective pigment film, part of the reflected light is absorbed by the retina, and the other part reflects the cat’s eye, which is seen by the observer (i.e. you), making the cat’s eye glow in the dark.

       The eye is like a sophisticated camera. The pupil in front of the eye is equivalent to the diaphragm shutter of the camera, which can control the intensity of light entering the eye. Behind the pupil is a double convex lens, which is equivalent to the convex lens in the camera lens, which can focus. At the bottom of the eye, there is a retina, which is equivalent to photographic film. The retina is connected to the optic nerve. When viewing objects, the light first enters the lens through the pupil. The radian of the convex surface of the lens can be adjusted so that the focus of the light falls on the retina. There are photoreceptor cells in the retina. The excitation impulse produced by the stimulation of light is transmitted to the brain through the optic nerve, thus producing vision.

       And the night vision function of cats is because they eat a lot of taurine Without taurine, the cat’s pupils would never be particularly visible. The reason why cats eat fish and mice is that these two kinds of food contain a lot of taurine, and humans don’t need to eat so much taurine. Now, the finished cat food also contains a lot of taurine. (if you want your eyesight to be good, you can also eat more fish)

       Hope to adopt

       The cat’s vision in the daytime is much worse than that of human beings. However, the cat’s eye has an extraordinary ability to collect light, coupled with its high-performance hearing and amazing concentration, so the cat can see things in the dark, or even the darker the light, the clearer the cat can see. The reason why cats can see things in the dark is that they have developed lenses that are much larger than those of humans. Therefore, the cornea position of the lenses is closer to the retina. In order to focus the light accurately, the curvature of the two is increased. Of course, more light can be collected.

       Because there is a small area behind the retina of a cat’s eye that reflects light, as long as there is a very small amount of light, it can reflect it. Because of this, the cat’s eyes will shine in the dark. It’s not the cat’s eyes that shine, it’s the reflected light. The structure of the eye of Canidae is compared with that of Felidae. When the light passes through the retina and reaches the iris at the back of the eye, it is reflected back to the retina for imaging. This is why dogs and cats can hunt at night with the help of low light. The light reflected from the iris still passes through the retina, which is why you can see the light in the eyes of cats and dogs in low light. Cat’s eyes are special. When the light is stronger, its eyes will be a line; when the light is dark, its pupils will be enlarged; in the dark, the cat’s eyes will be bright, and whenever these eyes are bright, people always feel afraid. In fact, the cat’s eyes do not emit light, but there is a reflective plate like substance on the retina behind the eyes, which can reflect the collected light energy. So we see the cat’s eyes are bright at night. The pupil of a cat is very elastic, and its ability to contract is very strong. So the cat’s vision is very sharp, it should be six times as strong as human vision. This keen vision and wide perspective make it see a lot more than the scope of things. So this kind of extremely strong vision, then also constitutes a necessary condition for its survival. Starting from the role of the pupil, it is located in front of the lens, which controls the light intensity entering the lens and changes with the light intensity outside. At night, when the pupil of a cat becomes larger, it receives as much light as possible. However, because of the converging effect of lens and ciliary body, that is, convex lens, the light converges in a small range. It is precisely because the pupil is large and the photosensitive cells of human beings in the dark are columnar cells, with enhanced sensitivity, they will see that they are bright! There are many special crystal points at the bottom of the wolf’s eyes. These crystal points have a strong ability to reflect light. They can gather the scattered light around and focus on them. It seems that the wolf’s eyes are glowing. This is a common physiological phenomenon in wild animals. There are many special crystal points at the bottom of the eyes of many animals. These crystal points have a strong ability to reflect light. They can gather and gather the scattered light around them. Animals with these glasses generally have a strong ability to move at night. They can distinguish objects with tiny light, but from the outside, they seem to be their eyes The eyes are shining. Most of them are nocturnal animals, including wolves, cats, tigers, leopards, owls and so on.

       There are gold, green, red, blue and so on. The specific color depends on the breed of cat.

       The color of the eyes of the cats with orange eyes is generally golden at night, while that of the cats with light green eyes at night is a white round luminous body;

       Persian cat’s eyes are normally blue and yellow. Under the light, one emits green light and the other emits red light. Commonly known as mandarin duck eyes, they are yellow, blue, amber, purple steel, green and light brown. There are some differences in color depth.

       Siamese cat, is the kind of chocolate hair, two eyes are light blue, night light reflection eyes are red

       [reasons for different color of hair eyes]

       The color of cat’s eye we see is actually the color on the retina of cat’s eye directly through the transparent cornea. The color of the retina mainly depends on the following aspects: different breeds of cats or cats of different individuals in the same breed have different ability to absorb and store pigment;

       Different pigments are deposited on the retina of all kinds of cats, making their retinas different colors,

       In cats of different breeds or individuals, there is a certain correlation between the deposition of pigment in the retina and the deposition of pigment in the skin and hair follicles. For example, there is absolutely no blue eye in the flower cat. The eyes of the black cat are mostly green, while those of the white cat with long hair are mostly blue, and sometimes there are mandarin duck eyes with different colors.

       [discrimination of cat’s eye color]

       The color of cat’s eyes is also one of the important basis to identify purebred cats. The eye color of some purebred cats is fixed. For example, the eyes of pure Siamese and Himalayan cats must be blue.

       If the appearance of the whole cat is the same as that of a purebred cat, but the color of its eyes does not match the eye color of the purebred cat, it means that the cat has mixed blood of other breeds.

       Hello, there are several colors of cat’s eyes. The color of the eyes of cats of the same species is not necessarily the same. For our ordinary domestic cats, there are orange yellow, light green, one eye is yellow and one eye is green. We generally call this kind of cat as yin-yang eye. The color of orange eye cat’s eye is golden at night, while the light green eye is light green In the evening, the color of the eyes of the cat is a white round luminous body. When going out on a summer night, the flashlight will often shine on the cat, but rarely see its body. The main thing is to see the pair of luminous eyes to know that it is a cat.

       Different breeds of cats have different eye colors. In fact, there are not many colors of cat eyes. Generally, they are blue, yellow, green, light brown, amber and purple steel. Besides, there are some color differences.

       The reason for the different color of cat’s eyes is the difference of breed, or the ability of individual cat in the same breed to absorb and store pigment is different. Different colors of pigments are deposited on the retina of various cats, making them different colors on the retina. The color of the cat’s eyes we see is actually the color of the retina of the cat’s fundus seen through the transparent cornea. There is a certain correlation between the deposition of pigment in the retina and the hair follicle. Therefore, there is a certain relationship between the color of cat’s eyes and the color of cat’s back hair. For example, flower cats never have blue eyes. Black cats have more green eyes, while long haired white cats have blue eyes. Sometimes some mandarin duck eyes have different colors. The actual effect of the color of the cat’s eye on the cat itself is unknown. However, when people evaluate the color of cat’s eyes, the clearer and more transparent, the purer and darker the color, and the more gem like.

       In addition, the eye color of the cat is one of the important basis for the identification of purebred cats. The eye color of some purebred cats is fixed. For example, the eyes of pure Siamese cat and pure Himalaya cat must be blue. If the overall appearance of a cat is the same as that of a purebred cat, but the eye color does not match the eye color of the purebred cat, it means that the cat is not purebred and has mixed the blood of other breeds.

       The cat’s eye is like a camera with exquisite design. The pupil in front of the eye is equivalent to the diaphragm shutter of the camera, which can control the intensity of light entering the eye. Behind the pupil is a double convex lens, which is equivalent to the convex lens in the camera lens, which can focus. At the bottom of the eye, there is a retina, which is equivalent to photographic film. The retina is connected to the optic nerve. When viewing objects, the light first enters the lens through the pupil. The radian of the convex surface of the lens can be adjusted so that the focus of the light falls on the retina. There are photoreceptor cells in the retina. The excitation impulse produced by the stimulation of light is transmitted to the brain through the optic nerve, thus producing vision.

       Cat’s vision is very sharp, in the light is very weak, even at night can distinguish objects, and cats also particularly like the dark environment. In the daytime, when the sun is strong, the cat’s pupil is almost completely closed. A thin line is used to reduce the light penetration. In the dark environment, the cat’s pupil is opened to increase the light transmission as much as possible. The width and narrowing of a cat’s pupil is as fast as adjusting the shutter of a camera, so as to ensure that the cat can quickly adjust its eyesight according to the intensity of the light and the distance of the object to be viewed, so as to make the focus and the object visible. However, the cat is color blind, in its eyes, the whole outside world is different shades of gray.

       The cat has a wide field of vision, with both eyes having a common vision and a separate vision. There is no sense of distance in the individual field of vision, but there is a sense of distance in the common field of vision. The individual field of vision of each eye of cat is more than 150 degrees, the common field of vision of two eyes is more than 200 degrees, while the field of vision of human is only about 100 degrees. A cat can only see things that change in light. If the light does not change, the cat will not see anything. Therefore, when looking at the East, the cat often has to turn its eyes slightly to make the scenery in front of it move to see clearly.

       Cat’s blinking membrane is located in the inner corner of the eye, like a special “eyelid”, which can be closed horizontally and back, and has an important role in protecting the eye. If the blink film is injured or sick, it will affect the cat’s vision and beauty, need timely treatment, usually also pay attention to protect its blink film, can not touch with hands at will.

       Cat’s eyes are special. When the light is stronger, its eyes will be a line; when the light is dark, its pupils will be enlarged; in the dark, the cat’s eyes will be bright, and whenever these eyes are bright, people always feel afraid.

       In fact, the cat’s eyes do not emit light, but there is a reflective plate like substance on the retina behind the eyes, which can reflect the collected light energy. So we see the cat’s eyes are bright at night. The pupil of a cat is very elastic, and its ability to contract is very strong. So the cat’s vision is very sharp, it should be six times as strong as human vision. This keen vision and broad perspective make it see a lot more than the scope of things. Then this strong vision, then also constitutes a necessary condition for its survival

       This should start from the role of the pupil, it is located in front of the lens, is to control the intensity of light into the lens, with the external light intensity and changes in size. At night, when the pupil of a cat becomes larger, it receives as much light as possible. However, because of the converging effect of lens and ciliary body, that is, convex lens, the light converges in a small range. It is precisely because the pupil is large, and the photosensitive cells of human beings in the dark are columnar cells, and their sensitivity is enhanced, they can see that they are bright.

       The secret of a cat’s eyes is that it can reflect light. A cat’s eyes have a mirror like coating that enables it to see clearly in the dark. This flashing substance can reflect light like a flashlight and make the cat’s eyes shine. I have also found information about the pupil size changes of cats: cats have very keen eyesight and can distinguish objects even at night when the light is very weak. Therefore, cats like to move in the dark environment. In the daytime, when the sun is strong, its pupils will narrow into a line to reduce the light, while in the dark, the pupil will be opened to increase the transparency of the light as much as possible

       Adopt it

       There are two types of photoreceptor cells in the eye: cone and rod cells. The ratio of the two cells determines whether the eye is visible during the day or at night. Owls have many cone cells, so they can see things easily at night. Sparrows have many rod cells, and they can only see things during the day. In normal eyes, the rod cells are a little more than the cone, so you can see things in the daytime and in the dark. Cats and dogs are not like owls cone cells, many animals, should be hearing or smell played a greater role, especially dogs.

Leave a Reply

Your email address will not be published. Required fields are marked *