We often see reports like this. A certain celebrity must not have had plastic surgery, because she looked similar to her now in photos when she was a child; but around us, we experience other people’s growth from a newborn baby to a As an adult grows, you witness his/her appearance change unconsciously.

Is it like some people think: the size of a person’s eyes remains the same throughout his life, and it is the same size as he is born! ? What "secrets" are hidden in the changes in our facial features from childhood to adulthood? ?

Have the size of human eyes never changed? This statement is not groundless. "It seems that only the eyeballs remain unchanged. The skin tissue between the eyes will definitely change." "I heard that the eye sockets remain unchanged." There are many similar statements.

Netizens who support the fact that the size of their eyes have not changed give the most advantageous arguments: “My eyes were so big when I was a child, but they don’t seem to be too big now” and “No wonder I often find that my eyes are not as big as certain Baby big”. Netizens said that it is precisely because the size of the eyes has not changed, but the face is growing, that it is "tragic" that the big eyes of the past have become the small eyes of now.

Experts pointed out that "the black eye we see is the cornea and iris, and the white of the eye is the sclera." The structure of the eyeball is divided into two parts: the eyeball wall and the content. Among them, the cornea and sclera are located in the outermost layer of the eyeball wall (the first 1/6 is the cornea, and the remaining 5/6 is the sclera). The cornea is colorless and transparent, and the sclera is milky white and opaque. The iris is located in the middle layer of the eyeball wall, and the hole in the center of the iris is the pupil. Newborn babies have more dark eyes and less white eyes because the cornea and iris occupy a large proportion, while the sclera is small.

Experts believe that the size of human eyeballs basically does not change after the age of 6-8, and is about the same size as an adult. The diameter of an adult's eyeball is generally 2.3-2.5 cm, but this shape is only relatively unchanged. For example, myopia will lengthen the axis of the eye.

In old age, the lens in the eyeball loses its elasticity and becomes presbyopia. The lens in the eyeball becomes cloudy and cataracts occur. These are all changes in the structure of the eyeball. For another example, patients with hyperthyroidism may have exophthalmos due to tissue proliferation in the orbit. This is also due to changes in the structure of the eyeballs.