Because people in Asia or China generally have a low nose bridge, many big-name frames or sunglasses are designed for Europeans with a high nose bridge, so the inclined angle is relatively large, and the high-energy nose bridge can live. However, if Asians use the same tilt angle, because the bridge of the nose is not high, the angle between the lens plane and the eyes is too large, and the tilt angle will be too large, which will affect vision correction and wearing comfort.