Protecting your eyes from the sun's harmful rays is very important if you are spending any time outdoors. Even days that are hazy or dull require protection for our eyes. Here are a few considerations.

Sunglasses come in a bewildering array of choices; never have there been so many options to select from. With all the variety you’ll want to know ahead of time what the differences are between tinted, reflective, photochromic and polarizing lenses. Of course the style of frame and size of lenses will be obvious differences when shopping for sunglasses. It will also be important to know exactly what purpose you’ll be using your sunglasses.

Yes, as we know the functions of the lenses of sunglasses are varieties for us to select. But we should know what we use it for before buy a sunglass. From the material and function of the lens we should think over. I agree with your view because i know that well as we specialized in producing the lenses.

It is quite true that there plenty of options.
We should be careful when purchasing a pair of sunglasses.
Some suggestions for buying sunglasses
1. check whether the lenses are smooth or not.
2. make sure the lens materials applied are capable to cut off UV rays.
3. Moreover, try not to buy sunglasses that are blue and purple. Because the deeper the color is, the more capable they tend to cut off UV. Therefore, buy sunglasses that are dark grey, chocolate and black should be wise choices.

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