* 3FORFREE coupon code is for a $19 discount (Standard Lens Package for all single-vision glasses), free shipping for orders in the US, and $25 cashback code. Cashback code will be sent by e-mail within 10 days of purchase. Use cashback code towards any purchase on GlassesUSA.com (valid for 6 months). Orders paid for by gift certificate or cashback code are not entitled to receive additional cashback. Offer valid till 9/22 11:59PM PDT. Limit one coupon code per purchase.