The article shared above is informative. But I think instead of using used glasses people can buy wholesale sunglasses from the online sites that offers wholesale sunglasses in an affordable cost. Eye protection is very important because eyes are one of the important body parts. As the proverb, saying "Prevention is better than Cure". So, wearing fresh wholesale reading glasses must be a good idea instead of wearing used glasses. Online sites like https://citysunglass.com/product-category/reading-glasses, Amazon, etc are accessible online.