What personality do different pupil colors represent?

Pupils are determined by different genes and have nothing to do with personality. Let me show you the following article:

The color of black eyes depends on the color of iris. Because of the different pigments on the iris, people's eyes are blue and black.

Why are the eyes of the East and the West different in color?

As we all know, orientals have black eyes and westerners have blue eyes. So, why do people of different races have different eye colors?

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

Then, why are the eyes of orientals black and those of westerners light blue? This should be discussed from the structure of eyeball iris.

Scientists have found that the iris of our human eye consists of five layers of tissues. They are endothelial cell layer, anterior limiting membrane, matrix layer, posterior limiting membrane and posterior epithelial layer. Among these five layers of tissues, there are many pigment cells in the stroma, anterior limiting membrane and posterior epithelial layer, and the amount of pigment contained in these cells determines the color of iris.

The more pigment contained in pigment cells, the darker the iris and the darker the eyeball. The less pigment, the lighter the iris color and the lighter the eyeball color.

The pigment content in pigment cells is consistent with skin color, which is related to ethnic inheritance. Orientals are colored people, and there are many pigments in the iris, so the eyes look black; Westerners are white, with less iris pigment and less interstitial blood vessels, so their eyes look light blue.

Iris, also known as "iridescence", is located between the cornea and lens of the eye, and there is a round hole with a diameter of 2.5 ~ 4 mm in the middle, which is the familiar pupil.

Iris contains pigment, and its color varies from race to race. What people usually call "eye color" is actually the color of iris. Different races have different irises. Yellow people contain more pigment and are brown, which looks like black from a distance, while white people contain less pigment and are light gray or light blue. There are uneven wrinkles on the iris surface. According to the research of scientists, these wrinkles are as different as fingerprints and will not change. According to this characteristic of iris, an electronic password door lock is made. When the door opener approaches the scanning hole, the scanning device will scan the iris image and compare it with the preset pattern. If it matches, the door lock will open automatically. There are muscles that regulate the size of the pupil in iris tissue, namely, the sphincter of the pupil and the dilating muscle, which are controlled by the parasympathetic oculomotor nerve and sympathetic nerve respectively. Their cooperation keeps the pupil size relatively stable. Through the change of pupil diameter, the brightness of light reaching the retina can be maintained at an appropriate and stable level.