Note: When using BestBuyEyeGlasses.com coupon codes, make sure you see the discount when you check out. Merchants use many different shopping carts and can put the coupon box on any page in the checkout process. It may be on the cart page or on the confirmation page, or somewhere in between. Check for a "coupon code", "promotion code", "discount code" or a similarly named input box during the checkout process.