Just as the name of sunglasses, the function of sunglasses is to protect people from the sun. When people stand in the sunlight, people adjust the optical flux by adjusting the size of our pupil. Therefore, while the sunlight intensity is beyond our ability to adjust the optical flux, our eyes may get hurt. As a result, in summer, many people wear white sunglasses in outdoors to alleviate the hurt caused by the sunlight.
Light-colored clubmaster sunglasses do not have a good effect on keeping eyes out of sunlight. But this kind of sunglasses has many different colors and is suitable for pairing up different clothes. And these sunglasses are really good decorations for people, especially for fashionable women. However, some other sunglasses for special use can do well in sunlight block. For example, while in beach, doing skiing and climbing mountains, we should wear this kind of sunglasses. So for different groups of people, they can choose sunglasses according to their interests and favors, but the basic rule is not to make eyes get hurt.
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!