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2. Do blue-light-blocking glasses work? This study suggests no - AOL

   www.aol.com/blue-light-blocking-glasses-study...

   Blue-light-blocking glasses claim to reduce eye strain from devices, but scientists say there are better ways to reduce the strain on eyes. Do blue-light-blocking glasses work? This study suggests no

3. Do blue light glasses actually protect your eyes? Eye ... - AOL

   www.aol.com/news/blue-light-glasses-actually...

   Blue light glasses are used to filter out this artificial blue light from digital devices, says Maturi. The lenses of the glasses have filters that sellers claim can block or absorb the blue light ...

4. Blue light-blocking glasses don't protect eyes or improve ...

   www.aol.com/news/blue-light-blocking-glasses...

   Blue light-filtering lenses typically block only about 10% to 25% of blue light, and screens don’t emit much anyway, said Rosenfield, who wasn’t involved with the new research. “The sun is ...

5. Blue light spectrum - Wikipedia

   en.wikipedia.org/wiki/Blue_light_spectrum

   The blue light spectrum is an essential part of the visible spectrum with wavelengths of about 400-480 nm. [1] Blue light is primarily generated by Light-Emitting Diodes (LED) lighting and digital screens, it has now become prevalent in the world around us. [2] LED lighting creates white light by combining blue light with other wavelengths ...

6. Biological effects of high-energy visible light - Wikipedia

   en.wikipedia.org/wiki/Biological_effects_of_high...

   Blue light, a type of high-energy light, is part of the visible light spectrum. High-energy visible light (HEV light) is short-wave light in the violet/blue band from 400 to 450 nm in the visible spectrum, which has a number of purported negative biological effects, namely on circadian rhythm and retinal health (blue-light hazard), which can lead to age-related macular degeneration.

7. Wratten number - Wikipedia

   en.wikipedia.org/wiki/Wratten_number

   Wratten numbers are a labeling system for optical filters, usually for photographic use comprising a number sometimes followed by a letter. The number denotes the color of the filter, but is arbitrary and does not encode any information (the 80A–80D are blue, the next filters in numerical order, 81A–81EF, are orange); letters almost always ...