That may explain why websites offering discount eyeglasses are growing in popularity. But are these online sites a good money-saving choice?
Max Levitte of Cheapism.com says, "I think it is a great option for a lot of people and I think that the worst that can happen is that you lost $50 at the most."
Cheapism.com compared prices and service for four popular discount eyeglass websites.
"That's for the very basic set-up," Levitte says. "And then if you have a more complicated prescription or bifocals, then the prices go up. But again, they remain under $40."
The fourth site, 39$glasses.com, was pricier, but received excellent customer reviews.
To order glasses online, you'll need your prescription and -- something not usually written on the prescription -- your PD, or pupillary distance, number.
Doctors may be reluctant to release that information, but Levitte says, "The Federal Trade Commission requires doctors to give you that information and they must give it to you."
It's also helpful to know what size and shape frames look good on your face. You can go to a bricks-and-mortar glasses store, try on some frames, and take photos, or use the virtual try-on tool that several of the sites offer.
It can take two to four weeks to get your glasses from an online site and it's also good to know the site's return policy.
To read Cheapism.com's research on online glasses discounters, click here.