The present invention relates to a pair of glasses, which includes a pair of frames, a pair of lenses, a nose bridge, and a pair of temples. Each frame has an upper convex rim and a lower convex rim at an external side. The upper convex rim has an upper aperture while the lower convex rim has a lower aperture. The lenses are fixed in the frames and the nose bridge is connected between the two frames. The frames, lenses, and nose bridge are integrally formed. Each temple has an upper bump and a lower bump at its front end. The upper bump has an upper pin for insertion into the upper aperture and the lower bump has a lower pin for insertion into the lower aperture. This design makes the assembly easy and does not require screws. With varied parts assembled in combination, the glasses can function in two different ways.