*Refer a Friend participation requires a purchase from both the referring customer and the referred person. Referral by referring customer must be made within 1 year of purchase. The referred person will receive 20% off their total purchase. The 20% discount cannot be combined with contact lens promotions or insurance. Referral card must be presented at the time of purchase and redeemed within Stanton Optical®. Referring customer will receive $169 towards a pair of non-prescription sunglasses, $169 has no cash value. Terms and conditions subject to change.