What color are the eyes of China people?

The eyeball refers to the middle part in front of the eyeball, which consists of cornea, iris and pupil. Because the cornea is colorless and transparent, the color of the eyeball is the color of the iris.

The human eye is approximately spherical and located in the orbit. The eyeball includes the wall of the eyeball, the inner cavity of the eye, contents, nerves, blood vessels and other tissues. The ocular wall is mainly divided into outer layer, middle layer and inner layer. The outer layer consists of cornea and sclera. The front 1/6 is transparent cornea, commonly known as "eyeball", and the remaining 5/6 is white sclera, commonly known as "white eyes".

People of different races have different iris colors. Scleral is a compact collagen fiber structure, opaque, milky and tough. The middle layer, also called uvea and pigmented membrane, is rich in pigments and blood vessels, including iris, ciliary body and choroid. Iris: ring-shaped, located at the forefront of the uvea and in front of the lens, with radial wrinkles on the surface called texture and uneven depressions. The ciliary body is located in front of the iris root, behind the choroid, on the side of the sclera, and inside the equatorial part of the lens through the suspensory ligament. The choroid lies between the sclera and retina. The blood circulation of choroid nourishes the outer layer of retina, and its rich pigment plays the role of shading darkroom.