Get 50% off prescription lens upgrades when you add code LENSES50 at checkout at GlassesUSA. Plus shipping and returns are free on all orders. Shop brands like Ray-Ban, Michael Kors, and more. We got this pair of Ray-Ban Eyeglasses with a diamond package and polarized sunglasses lens upgrade to drop from $405 to $291. These are the lowest prices we could find. Please note that sale frames and progressive and bifocal lenses are excluded from this promotion. There is no sales tax on prescription eyewear (except AL, HI, IL, KY, MO, NE, NM, NV, OH, OK, SC, TN, and UT).