Those that fail to block uv can leave your eyes exposed to more UV than if you w... | Hacker News

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czl 8 months ago | parent | context | favorite | on: People with blindness can read again after retinal...

Those that fail to block uv can leave your eyes exposed to more UV than if you were not wearing any sun glasses.

ghostpepper 8 months ago [–]

My layperson understanding is this happens because the mechanism that dilates the pupil responds to visible light so glasses cause it to open wider, but if they don’t block UV then you end up with more UV exposure than if you didn’t wear anything

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