It is real that many shop keepers sell sunglasses in cheap prices in order to attract more customers. These cheap sunglasses are in fashionable appearance, but they do not have any package and brand. It is easy to recognize that these sunglasses are not in good quality. So many opticians suggest us not buying the cheap sunglasses just because of their price and we should buy the qualified ones. Of course, it is not said that cheap ones are not qualified. It is perfect if we could buy sunglasses with both cheap price and good quality. But the point is whether our eyes may get hurt. Some cheap sunglasses with very bad quality not only could not protect our eyes from the glare sunlight, but also may hurt our eyes.
So to sunglasses, price is not that important, and it is the quality and its function that matter a lot. Even if there are not so many colors, styles and designs, the qualified ones are the best. So be careful when you pick the right sunglasses for yourself!