Structure of eyeglass frame

An eyeglass frame with a symmetrical structure, comprising:

• an earpiece frame having including a bar-shaped structure in which a width and an angle thereof vary according to the length thereof to be placed on an ear of a user;
• and
• a main body coupled to the earpiece frame through a radially pivoting hinge, serving as a pivot that rotates radially about a center of the hinge, and having an inner circumference of a closed curve receiving a lens,
• wherein the hinge is configured to guide the earpiece frame to be radially rotated while being inwardly folded toward the main body about the center of the hinge, whereby the folding motion of the earpiece frame induces the radial rotation of the earpiece frame, wherein the earpiece frame transitions to an inverted orientation relative to the main body when folded, and
• wherein a connection end of the earpiece frame which is connected to the hinge is spaced from the center of the hinge, the connection end of the earpiece frame being closer to an end portion of the main body where the main body contacts the hinge than to the center of the hinge when the eyeglass frame is folded.