Brand Sunglasses

US $399.99 US $159.00

Is there a difference between real name brand sunglasses and grocery brand or fake sunglasses?
do they provide the same protection? i was at the sunglass hut and the guy told me they do not provide the same protection, he said how much effort do you think they put into 10 dollar sunglasses, you get what you pay for, and he was not tryin to sell me, i had already bought a pair of sunglasses.

Does wearing artificial branded sunglasses can cause eye cancer?
And also, I'm wearing welding glasses is that okay for my eyes if I going outdoor during sunny day?? The welding glasses shape is just like wrap round style. Is that will cause eye cancer if wear it everyday?? Please somebody give an explanation in detail. Thank you.

                         

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