Buy one pair of Rx eyeglasses and get another pair for free when you apply code GSBOGO at checkout at GlassesShop.com. Choose from dozens of styles for men and women. We found some pairs for as low as $12.95, but most styles are priced at $19.95-$34.95. You can get free prescription lenses, reading lenses, or fashion (nonprescription) lenses as well. Just add both pairs to your cart and apply the code to see the discount. Plus each pair can be a different prescription. Shipping is free with $79, otherwise it starts at $4.95. Some lens choices and other upgrades cost extra. Note that this coupon only works on full-price styles. Sales tax is not charged in most states.