It includes stipule stem, stipule box and stipule. The stipule is in direct contact with the nose and plays the role of supporting and stabilizing the mirror frame. Some cast plastic frames can have no stipule stem and stipule box, and the stipule is connected with the mirror ring.

The connection between the mirror ring and the mirror foot is generally curved.

Glasses frame is an important part of glasses, which mainly plays the role of supporting glasses. Glasses frame with beautiful appearance can also play the role of beauty. The materials mainly include metal, plastic or resin, natural materials, etc. By style, it can be divided into full-frame, half-frame, frameless and other types.