Tracked by Evreward since 2012, SmartBuyGlasses offers coupons, cash back rebates and rewards, with savings as high as 88% off. SmartBuyGlasses discount coupons are rare, but are often more valuable than similar merchants. Even when SmartBuyGlasses doesn't have a coupon, you can always get up to 10% cash back, and other great rewards, with every purchase.