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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Human color vision uses up to three different photopigments to detect light (in daytime conditions). Two of them are very similar to each other; they’re not precisely tuned. Yellow light activates both.
If you block yellow light *and* you have both of those receptors, you will see more vivid green-yellow-red distinctions. It *cannot* show anyone colors they haven’t seen before, it just intensifies some colors. So the amount it helps depends on what you start with. I’ve highlighted the more common kinds of color vision that people have.
It amplifies the good parts of your color vision
– **normal color vision**
– blue-yellow colorblindness
It can help quite a lot with the bad parts of your vision
– **partial red-green colorblindness**
It does little to nothing for people with
– **strong red-green colorblindness**
– no color vision at all
The way these products are marketed is a recipe for disaster and frustration. Enchroma uses a not very nice marketing strategy where they target NCV relatives and are like “hey, this will (maybe) help your friends and family members” – they build a lot of hype and… well, imagine that they do nothing for you. Which isn’t uncommon. Now you’ve gotta break the bad news to your friends.
A smartphone app that rotates hues, identifies colors, or overlays texture (or all three) is a *lot* more reliable.
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