Why do the eyes see colors, and how do the eyes see colors?

I think it's light, the eye can see things because objects emit light or reflect light, and objects of different colors can reflect different colors of light, and this is related to the lens in the eye, because some people know that color blindness means that there is a problem with the lens.

Color is a visual effect on light produced by our life experiences through the eyes, brain, and empty hands. The perception of color is not only determined by the physical properties of light, but also by many other factors, such as the human perception of the color of the face is often affected by the surrounding color.

About vision.

Light is an energetic substance emitted by a light source, which is the movement of matter and the motion of particles. Objects absorb energy matter and also release energy, matter is also matter motion. Color is a property of matter.

The object reflects light, and the color substance also releases its own color substance. Vision is an interface. Visual energy metabolizes various color substances to produce various colors and color changes.

Therefore, there is light, there is movement of matter, and vision produces various colors and images.

The skin color of people in the world is white, black, and yellow, and the human eyes also have different colors. Eye color has a relationship with ethnicity. Caucasians tend to have blue or gray eyes, blacks tend to have brown-black eyes, and yellows are somewhere in between, with mostly brown or black-brown eyes.

Of course, this is only a general situation, and even brothers and sisters of the same nationality and even the same family do not have exactly the same eye color. Strangely, a person has two different colors of eyes, a white woman named Chanel in South Africa, who has one eye blue and the other brown. The color of the eyeball is determined by the color of the iris behind the cornea.

The iris is made up of muscles, elastic fibers, pigment cells, and pigments deposited on the iris. If there are many pigment cells and more pigment deposited on the surface, then the iris will be black. Conversely, the iris is gray or blue. Because the cornea is colorless and transparent, the color of the iris, that is, the color of the eyeball, can be seen.

By the way, does eye color have anything to do with personality? An 18th-century Swiss scholar believed that people with brown or dark green eyes tended to be irritable; People with dark gray eyes have a more melancholy personality; Tranquil people, on the other hand, tend to have blue eyes. This can only be experienced, not grounded.

However, there is a certain basis for the color of the eyeballs to be related to vision and reactivity. A vision research institute in the United States reported: "Eyesight is not as good as black eyeballs, whether it is light gray, light blue or green."

Black eyes are also more discriminating, and some believe that this may be due to the fact that the iris of the black eye can "emit" more light. Another scientist says that people with black eyes are the most responsive, followed by brown eyes. It is said that the Chinese are smart, which may coincide with this doctrine!

As a window to the human mind, the eyes will always attract people's attention, but if you look closely, you will find that many people have different colors of eyes, why is that?

The eyeball here refers to the anterior middle part of the eyeball, which is made up of the cornea, iris, and pupil. Since the cornea is colorless and transparent, the color of the eye is the color of the iris. So, why are Oriental eyes black and Westerners light blue?

This should be discussed in terms of the structure of the iris of the eyeball.

Scientists have found that the iris of our human eye is made up of five layers of tissue.

They are the endothelial cell layer, the anterior bounding membrane, the stromal layer, the posterior bounding membrane, and the posterior epithelial layer. In these five layers of tissue, the stromal layer, the anterior bounding membrane, and the posterior epithelial layer contain many pigment cells, and the amount of pigment contained in these cells determines the color of the iris. The more pigment contained in the pigment cells, the darker the iris and the darker the eyeballs. And the less pigment, the lighter the color of the iris, and the lighter the color of the eyeballs.

The pigment content in pigment cells is consistent with color and is related to ethnicity genetics.

Orientals are people of color, and the iris has a lot of pigment, so the eyes look black; Westerners are white and have little pigment in the iris and blood vessels in the stromal layer, so the eyes look light blue. The color of the eyes is the most important physical characteristic of the human body, but scientists have said that the color of the eyes can be changed.

Scientists point out that it is the melanin in the matrix of the front of the iris of the eye that determines the color of the human eye, and the more melanin there is, the darker the color of the human eye, and vice versa. The melanin content in the matrix usually remains constant for life, unless something abnormal causes it to change permanently. The key to the change in the color of a person's eyes is genetics and trauma.

Red vision: reddening of colorless things, seen in vitreous hemorrhage, hyphema, after irisectomy, after cataract extraction, after intraocular lens implantation, snow blindness, spinal cord tuberculous optic nerve atrophy, carbon monoxide poisoning, hysteria, albinism, drug poisoning, etc.

Xanthopia: Seeing colorless things turn yellow, seen in lens lesions, aphakaki, jaundice, hysteria, drug poisoning, etc.

Blue vision: Seeing colorless things turn blue, which is seen in the early stage after lens extraction, after intraocular lens implantation, spinal cord tuberculous optic nerve atrophy, carbon monoxide poisoning, etc.

Brown vision: Seeing colorless things turn brown, seen in lens lesions, drug poisoning, etc.

Purple Vision: Seeing colorless things purple, it is seen after lens extraction, intraocular lens implantation, retinal artery occlusion, drug poisoning, etc.

As can be seen from the above, there are many reasons for the color of the eyes, and lens lesions are one of them, and they are also one of the more common causes. A condition that occurs on the lens inside the eye is called a cataract, so if you have a problem with color in your eyes, it is recommended to go to the hospital to have a cataract checked.

Cold Ultramilk Technology** Cataract: Brings back clear vision.

Cataract cold supermammary technology is to surgically remove the cloudy lens and then implant an intraocular lens, which is often referred to as intraocular lens implantation, so that the patient's vision can be increased or even returned to normal. Compared with ordinary phacoemulsification surgery, cold phacoemulsification turns the ordinary phacoemulsification continuous heat production process into an alternating process of heat production and cooling, so the heat generated during the ultrasound process is significantly reduced, the corneal tissue will not be burned, and the postoperative recovery is faster and the vision is better.

Advantages of Cold Superemulsion Technology** Cataract:

The surgical incision is small, the traditional surgical incision is 8 12mm, and the ultramammary surgical incision can be reached by cold supermammary incision; The minimally invasive technique is non-bleeding, seamless, and minimizes patient suffering.

The postoperative response is mild, the incision heals quickly, the postoperative recovery is faster, and the vision is better.

The visual recovery is fast and good, and the postoperative astigmatism is small; It is also more conducive to correcting or controlling postoperative astigmatism.

Surgical control is better, safety is high, and intraocular lens implantation is safer, more reliable, and basic**.

There is no need to be hospitalized, and you can go home 1 hour after surgery; Aspherical crystals, 2 to 3 days after surgery, you can return to general life.

There is no need to wait for the cataract to mature before surgery, and the inconvenience and pain are relieved in advance, and the effect is better.

The human eye can see different colors in the world because the human eye can receive a certain frequency of electromagnetic waves, and the visible light in the electromagnetic waves produces different colors due to its own frequency.

Because there is a kind of cone cell inside our eyeball, the cone cell contains a variety of pigments, which can help us perceive the color change of the outside world and form the corresponding image.

Cone cells can identify a wide variety of colors by distinguishing the amount of basic color light, and human visual cells are divided into two types: cone cells and optic stem cells.