
Works well. It blocks most of the blue light when I used their little UV light tester and card. I'd say it's 90-95% blocked. And my daughter loves wearing it. FYI: I used the same light and card and placed my transitional prescription glasses between the light and card. it was 100% UV blocking. Using this as my comparison, I'm pretty sure that 90-95% of the right glasses will fit these blue sun goggles for kids. And for the price it's great!

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