They are a shitcoin, removing the information hidden in light necessary to live healthy.
Discussion
The shitcoin ones are the ones that let everything through. They don't work.
The ones that work filter UV.
"UV light can cause several serious eye conditions, including cataracts, pterygia ("surfer's eye"), and macular degeneration. These chronic effects develop over time and can lead to irreversible vision loss. UV exposure can also cause short-term, painful photokeratitis ("snow blindness")."
Check out nostr:npub16guycjkxy04e79dwfjejaeafkqlqyq5q94f0yw2l9m50vse32x4qsyulsy work, or Dr Jack Kruse. Peace