Glasses USA cuts 50% off most items sitewide via coupon code "EASTER50FS". Even better, the code also yields free shipping. That's tied with our mention from last month, and although not as strong as our November mention (which included $20 cash back in addition to 50% off and free shipping), it's still among the best discounts we've seen from Glasses USA. Eligible items include single-vision lenses and frames from brands like Calvin Klein, Kenneth Cole, Lucky Brand, and more. Frames marked "Premium" are excluded. Deal ends March 31.