Yellow-tinted blue light blocking glasses are worthless for everyday use; to filter out enough blue wavelengths requires a dark orange lens so dark that you cannot see what you're doing, making them impractical for normal activities despite showing lab effectiveness.

factualpending

Speaker

Richard Cytowic

Evidence Quote

In order to filter out enough of the blue short wavelengths, you need a dark orange lens and it's so dark that you can barely see what you're doing. So, you know, you can show the effectiveness in a lab, but for everyday living and trying to get around, you'll be stumbling all over the furniture because you won't be able to see anything.

Source

Your brain wasn't built to hold this much information | Richard CytowicBig Think
Created: 8/12/2026, 6:39:44 PM

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