Glasses USA offers basic prescription sunglasses lenses for free with the purchase of a sunglasses frame via coupon code "SUNNIES2016". Plus, all orders receive free shipping. That's tied with our mention from last week, a $29 savings, and the best such coupon we've seen on these lenses from Glasses USA. Some exclusions apply.

Note: The coupon is good for a $29 discount, which is the price of basic single-vision lenses. Progressive or bifocal lenses are also available for an additional fee.