2 Pair Computer Glasses Blue Light Filter Women (Grey Frame, 3.50)

[♪♪] [Makda] We're in a galaxy of glasses. [Makda] Shopping for spectacles. There's choice galore. [Makda] Our secret shopper is a Marketplace producer and she really does wear glasses. The frames are all about fashion, but it's the lenses that are the real focus. [Makda] We're taking a hard look at a filter that's supposed to block the blue light from screens. [Makda] Blue light-filtering lenses are everywhere online, but we want to test how the country's big chains are pitching the latest trend in-store, so we're undercover inside Hakim Optical, LensCrafters, Vogue Optical, and Hudson's Bay Optical. We're visiting three stores for each of them. That means a dozen visits. [Makda] The sales pitch sounds and looks convincing. [Makda] And then the claims start to sound alarming. [Makda] At one chain, we even hear the "c" word. [Makda] Yikes. So what does it cost to save our eyes? [Makda]