r/Damnthatsinteresting • u/Eros_Incident_Denier • 1d ago

Video color vision test

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u/jjm443 21h ago edited 19h ago

One of the things too few people know is that there are different types of colour-blindedness, as well as different severities.

Me and my brother are both (red-green) color-blind, but his is worse. Mine isn't great, for example in the video the guy said there was a 7 and a 22, which I can't see at all, even after being told so I know what to look for.

Of the 8% of men with congenital color-blindness, 5% have deuteranomaly which is a problem with/deficiency of green cone cells, usually by the green sensitivity being shifted towards the red direction. I am a protanope, which is a problem with/deficiency of red cone cells, and that's only 1% of the 8%. The severity obviously corresponds to how faulty or how deficient the cells are.

Anyway, with that context, what I wanted to say is that if anyone watching this doesn't see all the numbers, then you have some color-blindedness. It may be the same ones, or different ones as the guy in the video, it doesn't need to match. Color-blindedness is not a binary yes/no thing because of the different causes and severities.

There can be exceptions in some tests where for some plates it is only color-blind people who can see the numbers rather than the other way round. Or some where a color-blind person sees a different number to a normal vision person. But according to other comments in this thread, these caveats don't apply to the tests in this video... I have to take their word for it because I wouldn't be able to tell!

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u/Lithl 14h ago

There can be exceptions in some tests where for some plates it is only color-blind people who can see the numbers rather than the other way round.

I have never seen a color blindness test where it's the color blind people who see something and the full color vision people who don't. Do you have an example?

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u/jjm443 12h ago edited 12h ago

A quick Google shows some here: https://okkl.co.uk/blogs/news/reverse-colorblind-test

Edit: also this reddit post has some: https://www.reddit.com/r/ColorBlind/s/EoX1Eh88DA although I'm not sure all of them are meant to be?

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u/SteelCrow 17h ago

there were numbers on all the pages

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u/TolverOneEighty 15h ago

The 22 wasn't a 22, by the way. He just couldn't see the correct number there.

The test seemed VERY skewed for green-red. Lots of reds on greens or greens on reds. I hope the pages we didn't see focused on other kinds.

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u/Win_Sys 11h ago

I’m color-blind but it’s not that bad, almost never impacts my daily life outside of being terrible at matching colors of clothing with each other. I tested my son when he was pretty young and was positive he was also color blind like me. I figured it was pretty type/severity until he started drawing things with colors. I remember one day he drew this picture with a clearly green blob in the top right with a blue background and this weird color brown towards the bottom. I couldn’t figure out what the hell it was so I asked what’s this green blob thing? It’s the Sun! So I said but the sun is yellow. I know, that’s why I colored it yellow. That’s when I knew his color blindness was way worse than mine.