Essentially, the browline frame is not only a frame shape, but also a design feature. The upper part of the frame is thickened, the upper part is made of sheet metal, and the lower part is made of metal. Because the upper part of the board is thickened, it's like drawing a raised eyebrow carefully and calling it the browline frame.
Beginning in the 1950s, a large number of scholars, dignitaries, and celebrities in the political and business circles began to wear eyebrow-framed glasses. Since then, these glasses have given a precise and shrewd image. If you want to give people a rigorous and peaceful impression, browline sunglasses are your first choice.