What size is the human eyeball

Medicine

What size is the human eyeball

The eyes of man are an amazing creation of nature,they allow you to explore the world around you, admire the sunset, look at the beautiful picture and just see the faces of your loved ones. The eyes give the opportunity to experience all the colors of life to the fullest. Looking in the mirror, a person sees only a small part of his eyeball - the cornea and the white shell. The main part of the organ of vision is hidden in the depth of the eye socket.

Few people know, but the human eyeball does nothas the form of a regular sphere. More precisely, it consists of two components connected to each other. The anterior component of the eyeball is smaller than the anterior component. It is called the cornea. This part is attached to the white shell - most of the eye. The average size of the cornea of an adult is about eight millimeters in diameter.

The cornea of the eye is connected to the white membrane by a special ring, it is called the border.

The size of the human eyeball

Everyone is the owner of a uniqueappearance, the color of the eyes is also individual, however, the sizes of the eyeball in adults are almost the same. They can differ only by a couple of millimeters. Usually the eyeball has a slightly elongated shape, that is, its horizontal dimensions are larger than the vertical and make up approximately 24 millimeters in diameter. A small, just-born little man is completely different, his eyeball is almost two times less than that of an adult. On average, the largest horizontal diameter is about sixteen millimeters. Surprisingly, the baby's eyeball grows very fast, by the age of three it reaches a diameter of 22 millimeters. Already in the thirteenth year of a person's life, eyeballs stop growing, because by this time they reach their adult size.

The adult's eyeball has a weight of about 7 grams and a volume of about 6 cubic centimeters.

The basic elements of the human eyeball structure

The human eyeball is quite complexstructure, it consists of several shells and a kind of ocular nucleus. It is the transparent contents of the eyeball - the vitreous and the lens. The eyeball has three shells that surround the inner transparent part. The outer shell - all the necessary muscles are attached to it in a special way. This shell performs the function of protecting the eyeball and supports its shape. The outer shell is divided into two components - the cornea and the sclera. The last component is rather dense, opaque and has a white hue. The second shell of the eyeball is vascular. It is very important, it is in it that the basic metabolic processes occur, it allows the eye of a person to eat. The iris and ciliary body adjoin the vascular membrane of the eyeball. Cilia are designed to protect the eye from mechanical effects, excessive light and other possible negative environmental influences. The third shell of the eyeball is internal, otherwise it is called the retina. It is thanks to this shell that all light and electrical impulses received by the eyeball are processed into a certain information flow, which is transmitted to the human brain. It is thanks to these complex processes that people are able to see and perceive the world around them.