Declining eyesight improved by looking at deep red light

Re:Declining eyesight improved by looking at deep red light by lsiebert on Tuesday June 30, 2020 @05:33AM (#23688292)

This is the hex value for 670 nanometre red.

#ff0000

Per https://academo.org/demos/wavelength-to-colour-relationship/

[ Parent | on HN ]

Re:Declining eyesight improved by looking at deep red light by Etheryte on Tuesday June 30, 2020 @05:42AM (#23688351)

This only makes sense on a precisely calibrated display. On everything else, there's no way to tell what wavelength you actually end up with when you fill your screen with a color.

[ Parent | on HN ]

Re:Declining eyesight improved by looking at deep red light by contravariant on Tuesday June 30, 2020 @06:15AM (#23688555)

A perfectly calibrated display might still not be able to display pure wavelengths. At the very least if it's calibrated properly it won't normally do so at #ff0000 as pure 670nm is well outside the sRGB colour space.

[ Parent | on HN ]

Re:Declining eyesight improved by looking at deep red light by liziwizi on Tuesday June 30, 2020 @06:23AM (#23688608)

yes but when i drag the slider i see that 645-700nm is also ff0000.

i don't know how precise it should be..

[ Parent | on HN ]

Re:Declining eyesight improved by looking at deep red light by andy_ppp on Tuesday June 30, 2020 @06:11AM (#23688527)

I imagine the brightness of a monitor is not enough for there to be any effect but maybe I'm wrong?

[ Parent | on HN ]

Re:Declining eyesight improved by looking at deep red light by rbanffy on Tuesday June 30, 2020 @08:01AM (#23689190)

I would assume one needs a very good laser+DLP projection system to make this work.

[ Parent | on HN ]