How to choose sunglasses

I think wearing sunglasses the most important is that you could look at anything real. Some may make you see things closer or further, don’t believe the shopkeeper if he told you that just because glasses have the function of amplification. If you believe that, you are tricked, you can’t wear it to drive a car to avoid traffic accident, except driving bumper cars.Above I think is the basic for buying outdoor sunglasses, is the necessary condition. What’s more, the functions of material, style, color, polarizing, discoloration and so on should be taken in mind.
As for design, process, climate adaptability etc. factors, authentic sunglasses are made from TR90 for their frame and legs, because of the good toughness of it, not easy to shange shape. As PC isn’t to be broken can be used to make lens. It is said glare windows of shuttle are made by PC also. The common point is light. Not to say outdoor sports, as usual nobady wants to wear such a heavy thing on head.
About style, there is little to say. because diferent people have different hobbies, I think that is “just feeling you like”, and wearing your owen sunglasses don’t mind whoever saying anything. The color here mentioned points to the lens’, usually light black, brown or smoke gray all are OK, I don’t recommend deep colors, they are better used in strong light environment. Under normal environment wearing it needs some time to adapt to, and easy to make you ignore object detalis.