If your eyes can be seen very clearly when you put on your sunglasses, your lenses are too pale.
When the sun goes down, it's better to remove the sunglasses, otherwise, our vision will be affected in the weak light place.
Should choose the sunglass that normal manufacturer produces to normal lens shop to prevent ultraviolet ray function.
Pay attention to the surface of the lens when choosing.
When buying sunglasses, you can judge according to whether things are clear. To buy high quality sunglasses, the only way to do is to optics professional shops, regular glasses shop to buy sunglasses.