They are sold in all major optical stores. The poor quality sunglasses actually refer to the kind of sunglasses sold at stalls outside for a few yuan or more. Because the lenses are made of plastic, the image The effect is not good, it affects the vision of the eyes, and it does not have the function of protecting against ultraviolet rays, so it is best not to wear it. Go to an optical store and buy polarized lenses or UV400 sunglasses. If the price is above 50, basically there won’t be too many problems. You can ask the store to take test paper to test whether it is polarized. Of course, if you want something better, you can choose sunglasses from some brands, such as: Bertha, Neon, Battlefield Jeep, Caponi, Bertha, etc. . .