I did not see an explanation. I asked Grok. Here is some of what it says:
“The most well-known brand is EnChroma, which creates glasses that enhance color perception for those with red-green color blindness, the most common type. These glasses work by using special filters to separate overlapping wavelengths of light, making it easier for the eyes to distinguish between colors like red and green.”
...
“People with complete color blindness (monochromacy) typically don’t benefit as much.”