The hook is on the ear and can be moved. It is connected with the pile head and plays the role of fixing the mirror ring. A joint connecting the pile head and the mirror foot. Tighten the screws to fasten the locking blocks on both sides of the opening of the mirror ring, so as to fix the role of the lens.

A pair of glasses frame is usually composed of mirror ring, nose support, pile head, mirror foot and other main parts. In addition to the above parts, there are also foot sleeve, bracket screw, hinge screw, etc.