Everyone has their own unique logo, what is your logo, and why?

Everyone has a unique iris. Here's an introduction to the iris:

1. Introduction. A flat, circular annular membrane in the middle layer of the eyeball wall. Located between the cornea and the lens, it can be seen through the cornea, commonly known as the "black eyeball".

There is a small round hole called the pupil through which light enters the eye. The iris is mainly composed of connective tissue, which contains pigments, blood vessels, and smooth muscle. The color of the iris varies depending on the amount and distribution of pigments, but there are generally black, blue, gray, and brown.

2. Pupil and iris.

The iris has smooth muscles arranged around the pupil, called the pupil constriction muscle (pupillary sphincter), and smooth muscles arranged radially around the pupil, called the mydriatic muscle (pupil opening muscle). The former is innervated by parasympathetic and the latter by sympathetic. When bright light shines on the eye, the pupillary sphincter contractes, restricting light entry;

When light is weak, the pupil dilated by the pupil dilated by the dilated pupil and increased light entry. The size of a normal pupil is also related to many factors such as age, refractive status, etc. Infants up to 1 year of age have the smallest pupils, which gradually increase and become smaller after puberty.

The pupil of the myopic eye is larger than that of the farsighted eye. When people are in pain or frightened, their pupils dilate, and when they sleep, their pupils are dilated.

The colors of the iris come in a variety of colors.

The iris has two sides, anterior and posterior, and the front is divided into the iris pupil and the iris ciliary part. The root of the iris is attached to the ** in front of the ciliary body, forming a part of the posterior wall of the anterior chamber angle, so the anterior and posterior movement of the root position of the iris will directly affect the width and narrowness of the angle.

The thickness of the iris varies, the root is thinner (so the root of the iris is often broken due to eye contusion), and gradually thickens inward, until the iris ring is the thickest part of the iris, about millimeters (due to the presence of the pupil sphincter), and then thinner to the pupil margin. The color of the iris varies mainly depending on the amount of pigment in the parenchymal layer of the iris and is related to race;

Europeans and Americans lack pigment cells in the parenchyma of the iris, while the pigment epithelial cells behind the iris have normal pigmentation and their iris is blue. In patients with albinism, the iris parenchyma and pigment epithelial layer lack pigment cells and are pink in color, which is the result of fundus reflexes. The iris of our people is rich in pigment and has a tan color.

The above content reference: Encyclopedia - Iris.

Each person has their own unique logo, which is the ID card, which has the name, home address, ID number, and one ID card belongs to only one person.

Everyone has their own unique side. No two leaves in the world are exactly the same, and certainly no two people are exactly the same. Every person is unique, and everyone has their own unique side.

But what do you mean by logo? Can you tell us more about that?