A pair of spectacle frames is usually composed of main parts such as mirror ring, nose pad, pile head and mirror foot.

1. Mirror ring optical frame: The assembly position of the lens, use metal wires, nylon wires and screws to fix the lenses by means of grooves or drill holes, which affects the cutting of the lenses and the shape of the glasses.

2. Nose bridge: connect the left and right mirror circles or directly connect with the lens fixedly. The bridge of the nose is either placed directly on the nose or supported on the nose by stipules.

3. Nose pads: including stipules, stipules box and stipules. The stipules are in direct contact with the nose and play the role of supporting and stabilizing the frame. Certain cast-molded plastic frames are available without the stipule stem and stipule box, with the stipule attached to the mirror ring.

4. Pile head: The connection between the mirror ring and the mirror foot is generally curved.

5. Mirror feet: The hook is placed on the ear, which can be moved and connected with the pile head, which plays the role of fixing the mirror ring.

6. Hinges: A joint connecting the pile head and the mirror foot. 7. Locking block: Tighten the screws to fasten the locking blocks on both sides of the opening of the mirror ring, so as to fix the function of the lens.