I can recommend you some methods to guess whether the sunglasses are real or fake. First, you can see the plating, paint coating, polishing of sheet metal surface and color of the surface, the real sunglasses are uniform, and have no obvious blemishes, spots and scratches. Second, see printing, laser and engraving on the lenses and mirror legs, whether they are smooth, easy to identify, and not easy to fall off. Third, see the color, whether the colors are bilateral symmetry. Fourth, you can hold the feet of the sunglasses and face the fluorescent light, let the reflective strip of the lenses move slowly, the fluorescent film will not appear wavy, distorted shape. Finally, you should check whether the sunglasses have complete packaging, tag or product code and instructions.