It works. I had an old pair of Wayfarers lying around. Non-prescription. I don’t even know where they came from, but they were in a box of stuff in my house. I took them to my optometrist and had prescription lenses put it. No problem at all.
Frames are decent quality and entire pair of prescription glasses are a fraction of B&M eyeglasses store cost. You do require an accurate prescription as you will need to enter the correction variables. I got my prescription at Walmart for $ 55.00 and used it to order.
I think glasses are so expensive because people use their leftover HSA funds to buy glasses. Every year in December people who have saved for a medical emergency using Health Savings Accounts have sometimes hundreds of dollars to spend or they lose the money. The only thing you can really use it all up on quickly is glasses or contacts. So people buy expensive designer frames. That keeps the price artificially high. I know I spent over $400 on a pair of Coach eyeglasses because my money would have vanished otherwise.
I’ve never used ZenniOptical.com, though I’ve been tempted. Are the glasses really just $8? Another one of those online glasses shop offered the first pair free but I couldn’t figure out how not to get the $30 lense upgrade, so I abandoned the purchase.
I love Zenni, yes some frames are that cheap! I’ve converted a few people since my discovery of them in October, and some of us now sport a few pair.
The answer to the OP, as trite as it sounds, really is “because they can.” For the large part, there’s one manufacturer that makes all the frames by all the name brands, owns retail outlets and some of the optometry stores, and has an eye insurance company. I learned this from a 60 Minutes segment, found here.
The online opticians interest me, but I like Smith’s Opticiansin my city. (Their own site is down as they retool to allow online ordering.)
They have a huge selection of vintage frames & also get assorted “current” styles. Like my violet John Lennon wire rims. Or the really good Rayban knockoffs. Or the steampunk shades…
Excellent prices, finished glasses within a few days–and they make them “fit.” Really, see if there are any little shops in your own city.
Just to pick nits… You don’t lose money you don’t use in an HSA (Health Savings Account). You DO lose leftover money in an FSA (Flexible Spending Account).
You don’t even have to take the non-Rx lenses out yourself. My eye doc did it for me and gave me the non-Rx lenses back in case I wanted to switch back at some point.
60 Minutes had an interesting story about this a few months ago. The Italian company Luxottica controls a big chunk of the eyewear business. They own several brands as well as making the frames for other designer labels. They also own many eyeglass retailers (LensCrafters, PearleVision, Sunglass Hut). So they are able to keep prices artificially high by reducing competition.