That's right Bonlook is offering $20 off everything on the the website. That means all glasses and sunglasses are discounted. I wouldn't waste a minute as the $20 off Bonlook sale is good for three days only.
Here are the terms and conditions of the Bonlook sale;
Limited time offer. Selected products only. Nadine's Frames are excluded from the promotion. Offer valid from May 13, 2016, 10:00 AM ET until May 16, 2016, 8:00 AM ET. Cannot be combined with another coupon or promotion. Cannot be applied on pre-order items. Canadian orders with prescription are sold by BonLook Québec. Available while supplies last. No redeemable for cash. No adjustments on previous purchases. Bonlook reserves the right to modify or discontinue these promotions at any time without notice.