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A comment on Declining eyesight improved by looking at deep red light. Parent comment

Re:Declining eyesight improved by looking at deep red light by cycomanic on Tuesday June 30, 2020 @02:32AM (#23687244)
(a) not a medical person so can't answer this

(b) unlikely, monitors work by essentially filtering out undesired colors from white light. I don't believe that >650nm light is within the color gammut of monitors. That's quite a long wavelength and close to infrared. To give you an indication, the Helium Neon lasers which used to be very common in schools etc for laser demonstrations have a wavelength of 632nm. Even if the monitor could display this, the brightness would likely not be strong enough.

(c) Could be, but it might be quite annoying to do.

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Re:Declining eyesight improved by looking at deep red light by Retric on Tuesday June 30, 2020 @06:20AM (#23688590)
There are several different approaches to monitors, OLED RGB sub pixels individually emit light. https://en.wikipedia.org/wiki/OLED. That said, your wider point stands.
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