Eyeglasses.com

Eyeglasses.com has a huge selection of both frames and lenses and is also one of a small number of sites that offer a lens replacement service for existing frames, with prices starting at $49. As with all the other sites here, you simply choose the lens you want (that can be a little daunting because there are so many options) and you’ll get sent a prelabeled box with which to return your frames, with free shipping both ways. If you don’t know your prescription — and don’t want to change your current prescription — you can opt to have Eyeglasses.com’s technicians “read your lenses and duplicate them.” 

The service isn’t superspeedy in terms of turnaround time, but the lenses are high-quality and the eyewear site has good online help options, including a Replacement Lenses Wizard and an online chat feature. Unlike Lensabl, which highlights its lens replacement service, Eyeglasses.com doesn’t market the option front and center. 

Eyeglasses.com makes lenses for Bose Frames and Amazon Echo Frames audio glasses.

Notable site features: Eyeglasses.com says it only sells “high-quality, individually made lenses made in the USA,” and the sample glasses I tried had excellent lenses that gave me a very sharp image. There’s a huge selection of lens options, and you get a “Perfect Lenses Guarantee” that allows you to send your glasses back if they don’t work for you — you can get a redo or a full refund, your choice.

Current deals and coupons: 15% off for new customers in exchange for your email address.

Shipping times: For replacement lenses, you can expect it to be a 10-to-14-day process from the time you place your order. You can cut down the time a bit with a one-day shipping option for an extra $12 fee.