What is the color of the whites of the eyes of a normal person?

The colors of the eyes are: one, brown live dark brown; two, hazel; three, blue-amber; Fourth, green; five, blue; six, gray; Seven, light purple. Brown is generally Asian and does not have black eyes; Hazel and other are generally found in West Asia and other places; Green is dominated by Northern Europe; Gray is commonly found in Africa.

Purple is rare, and the famous actor Elizabeth. Taylor is known for his purple eyes; The rest of Europe and the United States have their own distribution. Human eye color refers to the eyeball, which is composed of the cornea, iris, and pupil, and since the cornea is colorless and transparent, then the color of the eyeball is determined by the color of the iris.

Scientists have found that the iris of the human eye contains many pigment cells, and the color of these cells determines the color of the iris.

People of different races have different iris colors. The sclera is a dense collagen fiber structure, opaque, milky white, and tough. The middle layer, also known as the uvea, is a pigmented membrane, which is rich in pigment and blood vessels, including three parts: the iris, ciliary body and choroid.

Iris: ring-round, in the anterior part of the uvea, in front of the crystal, with radial folds called textures, and uneven crypts on the surface. The ciliary body is bordered anteriorly by the base of the iris, posterior to the choroid, lateral to the sclera, and medial to the equatorial part of the lens by the suspensory ligament.

The choroid is located between the sclera and the retina. The blood circulation of the choroid nourishes the outer layer of the retina, and the rich pigment it contains acts as a darkroom.

In short, the cornea is rich in nerves and has a keen sense. Therefore, in addition to being the main structure for light entering the eye and refractive imaging, the cornea also plays a protective role and is an important part of the human body to measure human perception.

The normal color of the white of the eye is white, because it is said in traditional Chinese medicine that white belongs to the main body of the lungs, and the main white of the lungs is white.

However, if you have a certain disease, it may change to a different color, for example, the whites of the eyes of jaundice patients will turn yellow, and some patients with infected eyes will have red blood on the whites of their eyes. Once the color of the whites of the eyes changes, it is necessary to pay attention to whether it is caused by other diseases. In this case, it is necessary to go to a regular hospital for diagnosis and treatment.

The human eye is divided into 8 colors, namely: black, blue, green, brown, brown, yellow amber, gray, and light purple.

1, black: this is the most, most of the Chinese are black-eyed, and Africans.

2. Blue: Europeans and Americans.

3. Green: Green eyes are more common in Northern Europeans.

4. Brown: Asian race is brown and dark brown.

5. Brown: Asian race.

6. Yellow amber: Asian.

7. Gray: Europeans and Americans, etc.

8. Light purple: Purple is rare, and the famous actress Elizabeth. Taylor is known for his purple eyes.

We Chinese eyes are black, so why are Westerners' eyes blue or other colors? In fact, when we talk about different eye colors, we actually mean that the front and middle part of the eye is different in color, which is composed of the cornea, iris and pupil. Since the cornea is colorless and transparent, the color of the eye is the color of the iris.

The iris of the human eye is composed of five layers of tissue: 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 anterior bounding membrane, the stromal layer, and the posterior epithelial layer contain many pigment cells, and the amount of pigment contained in the pigment cells determines the color of the iris.

The more pigment cells contain, the darker the iris and the darker the eyeballs. The less pigment there is in the pigment cells, the lighter the color of the iris and the lighter the color of the eyeballs. The amount of pigment 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, while Westerners are white, and the iris has less pigment in the iris, and there are blood vessels distributed in the stromal layer, so the eyes look light blue or green.

What kind of color is a man's eyes, in general, that is, our usual white eyes, black eyeballs, are our normal human eyes.