Why are the eyes in the middle blue?

He brought contact lenses, which was very interesting in the non-mainstream.

Hidden glasses, I also have them, hehe....

This should be asked of a cosmetic specialist.

Blue eyes are Caucasians, usually most people in Russia, Finland, Denmark, Sweden, Norway and other European and American countries have blue eyes, blue eyes look very special, as clear and bright as wearing contact lenses. Regarding the specifics of "what kind of race are blue eyes", if you are interested in each silver faction, you can continue to read and understand.

1. Russians.

Russians are the most populous ethnic group in Europe, with a narrow nose, thin lips, light hair color, clear facial contours, and light eyes.

2. Finns.

Finns are a Nordic people, belonging to the Nordic type of the Europa race, with fair-skinned**, golden hair color and blue eyes, and there are also Finns in Sweden, Russia, Germany, Canada and other countries.

3. Danes.

The Danes are the main ethnic group of Denmark, belonging to the Nordic type of the Europa race, with a tall stature, light hair color, round eyes, and blonde hair and blue eyes are the main characteristics of the Danes.

4. Swedes.

The Swedes are the main ethnic group of Nordic Sweden, belonging to the Nordic type of the Europa race, and are also distributed in Finland, Denmark, the United States and Canada.

5. Norwegians.

Norwegians belong to one of the Nordic ethnic groups, are the main ethnic group of Norway, belong to the Nordic type of the Europa race, the human race has light hair color, mostly gray-blue eyes, and is also distributed in Sweden, Denmark, and Canada.

<> because the white eye has less iris pigment, the eye color is lighter, and it forms blue after being refracted by light.

Blue eyes can be described in many ways, but here are a few descriptions:

1.Clear and bright: The blue eyes vary in shades, but they are all clear and bright in color. Some people's blue eyes are as blue and fresh as the sky, while others have blue eyes like the blue ocean.

2.Crystal clear: The color of Jing Qing's blue eyes is usually brighter, giving a sense of crystal translucent, especially in sunlight, which is more noticeable.

3.Deep and secluded: Some blue eyes have a deep and serene hue, like the night sky, giving people a sense of mystery.

4.Immature and pure: In some young people, the color of blue eyes looks immature and pure, like a child who has not been sold.

5.Calm and firm: The color of blue eyes can also give a sense of calm and firmness, as blue is seen as a deep, steady, and calm color.

To sum up, blue eyes can be described as clear and bright, crystal clear, deep and quiet, immature and pure, and calm and firm.

1 Blue eyes are often described as clear, bright, and crystal clear.

2 This is because the iris of the blue eye contains very little melanin, which makes it easier for light to penetrate and produce a deep blue color.

3 At the same time, blue eyes are often described as deep and mysterious, as they reflect their surroundings and create a unique atmosphere.

As a result, blue eyes are a kind of visually translucent, deep and mysterious that leaves a lasting impression.

Blue eyes are as blue and deep as gems bred in the ocean, which makes people can't help but praise the clever return and noisy game, and can't help but explore the secrets in the eyes. When he laughs, his eyes blink and blink, and he is like a little starlight in the blue sky, full of life and enthusiasm.

We can observe the wonderful world through the eyes, the eye is a very fragile organ of human weight, and careful people will find that some people's eyes are black, some people's eyes are blue, why do people have different colors of eyes? Next, I bring you why some people have blue eyes, welcome to read!

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. Generally speaking, most 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.

Why do some people have blue eyeballs? According to the British "Daily Telegraph" on January 31**, this is because of a genetic mutation that occurred 10,000 years ago.

Hans Eberger, a professor at the University of Copenhagen who conducted the study, said: "In the beginning, everybody's eyes were brown. "The ancestors of these blue-eyed people probably came from the eastern or northwestern Black Sea region, where humans launched a massive agricultural migration to northern Europe during the Neolithic period between 6,000 and 10,000 years ago.

According to Eberger, the ancestors of the blue-eyed people most likely came from northern Afghanistan. He noted that the genetic mutation affected a gene called OCA2, and the people's eyeballs then changed from brown to blue. The OCA2 gene is responsible for making proteins such as human hair, human hair, and eye color.

However, this genetic mutation did not cause the function of OCA2 to be completely lost, but because of the decrease in melanin, the color of these people's eyes was "diluted" from brown to blue.

Eberger's findings were published in the journal Human Genetics. His research team conducted DNA analysis of blue-eyed people in countries such as Jordan, India, Denmark and Turkey.

"These people inherited the same variant in their DNA, so we think they have the same ancestor," Eberger said. ”

There are two main types of blue eyes: sky blue and steel blue.

Sky-blue eyes usually appear a bright light blue, a color that is commonly found in the Nordic and Caucasian races. In the sky blue eye, the pigment content is lower, so the eye looks more transparent and brighter.

The steel-blue eyes, on the other hand, are a deeper, calmer blue of the jujube ruler, usually found in the Slavic and Mediterranean races. The steel blue nape eyes have a higher pigment content, so they look deeper and more mysterious than the sky blue eyes.

In addition to this, there are also some mixed blue eyes, such as a mix of green and blue, a mix of purple and blue, and so on. These hybrid blue eyes are also beautiful, but due to ethnic and genetic differences, each person's eye color is different.

1 There are two types of blue eyes: light blue and dark blue.

2 Blue eyes are caused by the different levels of pigment in the human eyes, light blue is mostly less pigment in the eyes, and dark blue is mostly more pigment in the eyes.

3 In addition to the blue-eyed Kirapa, there are also variants of purple-eyed and gray-eyed.

But these variants all belong to the Fan Qingshan domain, whose basic color is blue.

Blue eyes are further divided into several shades: bright pasteuric blue, cold granite porphyry blue, and sunflower fan orange blue. Bright pasteuric blue, as its name suggests, is bright and clear in tone, full of crystalline sensation, and looks very fresh and natural.

The cold granite porphyry blue and the deep blue of the sea basin are more like a cold blue auspicious silver hand, which is more calm and profound, with a sense of mystery and noble and cold aura. Sunflower blue, on the other hand, is a color between blue and green, which has a very fresh and bright feeling, but also has a certain sense of vitality and liveliness, which is very suitable for young people. Each of these three shades has a different charm, so you can choose the right color according to your preference.

Blue eyes can be distinguished into a variety of different blue tones in color, and can generally be divided into three types: dark blue, light blue, trapped mold fiber and cyan blue. Dark blue eyes usually have a deep, intense appearance, and it is difficult to distinguish the line between the pupil and the orbit when the light is low. Light blue eyes have bright, clear colors that are easier to notice than dark blue.

The blue-blue eyes are somewhere in between, with a subtle dazzling color. For example, the Qinghai-Tibetan eye in the Tibetan minority population is a blue-blue eye.

Blue eyes can be described as clear, jewel-like, mysterious, etc.

1. Clear: The blue eyes reveal a clear light, giving people a feeling of envy and brightness and clarity.

2. Jewel-like: Sapphire is a precious gemstone, and the blue eyes give people a jewel-like gorgeousness and a sense of dignity.

3. Mysterious: The blue-eyed Kuanchun reveals a mysterious aura that makes people feel elusive and decipherable.

The different colors of the whites of the eyes represent different physical states, and black and white is the healthiest color.

The whites of the eyes are blue, and the medical name is blue sclera. This sign is usually caused by chronic iron deficiency. Iron is a very important substance in the collagen tissue on the surface of the sclera, and iron deficiency can make the sclera thinner, and when the black and blue choroids under the sclera cannot be covered, the whites of the eyes will appear blue.

Chronic iron deficiency will inevitably lead to iron deficiency anemia. The whites of the eyes of patients with moderate and severe anemia are blue-white.

The human body does not have blue pigment, so why do you have blue eyes?

It turned out that it was all brown, and it was caused by a group of people who studied medicine in Europe and transfused animal blood into the human body back then. For example, in today's IVF, a drop of blood from a blue eyeball is taken and put into a fertilized egg, and it is possible to give birth to a baby with blue eyeballs.