In order to give some definitions, it is worth having an idea of what kind of area in question. Then it will be much easier to imagine the whole picture. First of all, in order to find out what peripherals are, it is advisable to turn to an explanatory dictionary.
Interpretation of the word "periphery"
First, pay attention to the origin of this word. From Greek, it translates as "circle." If formulated more generally, it is that which is outside, which is opposed to the center. Now let's turn to narrower areas and consider what periphery is in different areas of knowledge.
In the field of computer technology, this term refers to a combination of several external devices that are somehow interconnected. In Greece, the periphery is a term of administrative-territorial division and designates the largest unit equivalent to an administrative district or region in the Russian Federation.
In mathematics, the question of what is peripheral is answered: this is a kind of closed curve line that limits a figure. Another definition of the term is any organization, institution, which is located not in the center, but in more remote places.
Medical term
In the field of medicine, the concept of periphery is also used. We all know that we have a central nervous system, which is one of the components of the nervous system of the whole organism. So, if we talk about its structure, it is worth noting that both the organs and tissues of the body are connected by the peripheral nervous system. Thus, the nerve periphery is the binder within the central nervous system.
Retinal periphery
Did you find this subtitle surprised? Yes, yes, there is another answer to the question, what is the periphery! In this case, the term is associated with our organs of vision. The periphery of the retina is the most remote area of the retina, located farthest from the central fossa (which is scientifically called fovea). It cannot be clearly recognized, since it is not specifically defined by scientists. However, it is understood that this is an area in which cones are almost completely absent (visual receptors that provide a vision of everything that surrounds us in color).
As you probably already noticed, the concept of periphery is used in various fields of knowledge and has very different meanings that are not related to each other. Therefore, sometimes, in order to find out the meaning of a term, it is necessary to clarify what sphere is being discussed, and then it will be much easier to choose the correct interpretation of the word.