I saw another enchroma glasses video and wondered, if the person has always had “faulty” eyes that give wrong colours and smaller range of colours to brain to process, where does the error come in? If it’s the light receptors, how would glasses change those receptors ability to somehow now give correct colour for brain to understand.
And also how can brain understand those new colours immediately? I guess it must be hard coded to DNA and brain has developed correctly with that ability even if eyes can’t provide correct signals to match with colour data in brain.
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[This is](https://www.researchgate.net/profile/Mohamed-Elsherif/publication/346900208/figure/fig1/AS:967127251034119@1607592513577/Ocular-color-receptors-in-color-blindness-a-The-sensitive-wavelength-ranges-of-S-M.ppm)the curve for light sensitivity of the three different cones in the eye for normal and for some types of color blindness. You can see even if you have normal vision there is a lot of overlap between red and green curves. It is the relative strength of the signal from red, green, and blue cones that is used to determine the color
Red and green objects we see in nature do not just reflect a single frequency bit of a spectrum, A red object reflects red light to you but also some in the other part of the spectrum
What Enchrome glasses do is to filter out the light where the curve overlaps the most. Look at https://www.covisn.com/wp-content/uploads/2021/03/filter.jpg where there are 4 areas pointed out by the brown arrow that is filtered out. It removes the overlap and sleep which simulates a single cone the most.
The removal of the light that simulates multiple cones to similar degree makes it easier to tell colors apart
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