No, not all sunglasses need to be polarized. There are some common sunglasses that can shield the eyes in sun. Of courses, sunglasses polarized are better. Compared regular sunglasses, polarized sunglasses can not only reduce strong light, prevent UV rays, but also choose filter glares from water surface, metal surface etc. This is also the reason why many fishermen and driver like to wear polarized sunglasses.
The polarized sunglasses are becoming more and more popular, especially in outdoor activities. There is no doubt, polarized sunglasses, you should select. In recent years, more and more people wear these glasses because of their outstanding advantages. For example, these activities contain fishing, biking, and so on. Polarized sunglasses can filter out all harmful rays, and protect your eyes. At the same time, they can also be blocking glare by refracting light. However, the non-polarized sunglasses can prevent strong light by reflecting lamp on flat surface. But we should note, the report shows that polarized sunglasses in some cases are not perfect. For example, they do not work as well as the reflection near the snow surface. However, overall, the polarized sunglasses are really worth your own.
Compared with the common sunglasses, Polarized sunglasses have their own advantages. For example, they are designed to reduce the glare from surfaces like water, snow, and glass. They can be highly useful for sports, driving, and fishing by helping the participant in these activities to see more clearly, preventing you from potential hazards. While they may be somewhat more expensive than conventional sunglasses, some consumers prefer polarized sunglasses because they selectively block out glare, rather than making the whole field of vision dimmer, which can be dangerous in some situations. Maybe you still have some doubts about them, but you can have try so that it will make you feel comfortable.
Well, sunglasses will have to be polarized if they are supposed to serve good function to protect your eyes, because in this way, the glasses will be able to prevent reflected light and protect your eyes well. Perhaps in the future, a new kind of sunglasses will be born, which is also, bound to better protect human's eyes.