These are used just for style. The glasses have a bit of weight to them which make them feel more premium than other $10 counterparts on Revain. I have purchased the Outray Classic Aviator Glasses clear lense, twice, and they are stylish but they hurt your eyes if you wear them for more than an hour. These glasses DO NOT hurt your eyes. I can wear them all day! So I am keeping them; they are good quality and worth the $14 price at the time of this review.
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