First pair of glasses with 1.5 single vision index lenses is free at Coastal.com with code: FIRSTPAIRFREE . Plus you also get a FREE hard case, free tightening tool and a free cleaning cloth. Just enter the code FIRSTPAIRFREE at checkout.
You will have to pay $14.95 shipping and handling and it is limit one per household so if you have already gotten your free pair, you won’t be eligible again.
I ordered a pair a couple months ago and I love them. I have them on right now and they are so comfortable! I have worn them everyday for months without any issues.