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.
To tell if the guess sunglasses are real or fake, it is really hard to tell. The real ones will be times higher price than the fake ones, firstly, the price itself will tell you the truth. you can buy it from proper channels, you must remember, you will get what you pay for! However, there still have some ways for you to get some reference. Check the details; this is the way for you to consider the glasses' identity. You can check the workmanship, the model types and specification are all printed on the metal legs of glasses. The writing of the letters is clear and neatly. There must have some documents such as certificate of conformity and instruction to prove the identity of the glasses. The box of glasses should be exquisite workmanship make. The glasses cloth's texture is flexible and soft, it must be superfine fiber, if not, e. g. nylon makes, and that must be the fake. Moreover, you can find some remark of the customers when you purchase it online. To the summary, I recommend you to buy it from the proper channel even it is more expensive, but it bring you the feeling of trustworthy.