When you buy sunglasses

[glasses]

When shopping for sunglasses, many people tend to look at fashion first, rather than function. But we should keep in mind that the most important reason for wearing sunglasses in the first place is to protect our eyes. Ultraviolet radiation from the sun can be very dangerous, sometimes causing irreversible damage to our vision. To properly shield your eyes, you must wear the right type of sunglasses, since wearing the wrong type can cause more damage than wearing no glasses at all. So the UV protection is the first thing you should pay attention. At the very least, you should look for sunglasses that block at least 99% of both UV-A and UV-B radiation, and screen out 75-90% of visible light.