yes but when i drag the slider i see that 645-700nm is also ff0000. i don't know... | Hacker News

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liziwizi on June 30, 2020 | parent | context | favorite | on: Declining eyesight improved by looking at deep red...

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

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

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