this post was submitted on 06 Dec 2023
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This is accurate. Most likely you have a mild form of CVD, where some of the cones in your eyes overlap in their light frequency response. This makes it hard to distinguish colours containing that frequency range, because multiple cones respond to them when only one should.
The glasses actually work by completely blocking out the light in those overlapping frequency ranges. This will help to avoid the confusion between the cones, and could help you better distinguish colours containing components in those ranges. That's also why the glasses have this pink hue in the video. By removing some colours from white light, the remaining ones combine into pink-ish light.
Obviously, you cannot restore normal colour vision by blocking out even more colours. The marketing from enchroma is pretty scummy.
It sucks that their marketing is shitty, because what they actually do seems pretty clever. I have a pair of enchromas and I enjoy them for what they are - being able to distinguish color differences when I can't normally is fun.
It's an overpriced novel experience, probably not worth it but cool if you can afford it.
Shitty, but also really clever in terms of marketing. "Helping people with colour blindness more easily distinguish between certain colours whose wavelengths overlap (but are distinct to those without colour blindness)" is accurate, but not as exciting (or as easily understandable) as "FIXES COLOUR BLINDNESS".
Fair, I honestly don't know how else you explain that to most people concisely.
Sorry I wrote rods once when i clearly meant cones. You are correct that rods do not detect color of course, thank you for noticing the error.
Here is a pretty nice article on CVD that explores a lot of the genetics. It even mentions the enchroma (not by name of course) in the management section:
This might be an older article as i believe some research on notch filters has since been done. As far as I know, there is some limited evidence that they improve performance specifically in colour discrimination tasks. There's usually no evidence that they improve overall colour perception.
Not all cases of CVD are of this kind either (although it's the most common cause), if you have monochromacy, dichromacy, or generally anything other than anomalous trichromacy, these glasses will do nothing. There are even rare cases where the eye can see colour perfectly fine and the problem is in the brain, although this is usually classified as some sort of aphasia and is not strictly speaking colour blindness.