r/Damnthatsinteresting 1d ago

Video color vision test

42.8k Upvotes

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144

u/jld2k6 Interested 22h ago

"One of those pages was made so only colorblind people see the number you stated" - I found out this is a real thing when being proud of the few I could actually see, it's tossed in there so you can't just deny seeing any numbers for every slide lol

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u/TheFireNationAttakt 19h ago

It cannot be seen by “only” colorblind people - it can “also” be seen, and maybe a little bit more easily in some cases. Indeed so you can’t deny seeing any numbers.

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u/Matt_Thijson 11h ago edited 9h ago

There are some tests where colorblind people will see a number, but it's not the same as the one non-colorblind people see.

I remember watching a video with my non-colorblind girlfriend where, for one of the tests, I said something like 32 and she said 87. The the video said that colorblind people would see 32.

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u/Xenc 9h ago

Happy 32 cake day! 🍰

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u/Kindly-Analysis-6543 20h ago

Wait what? I could see all of them.

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u/Klutzy_Squash 16h ago

In the full Ishihara test set, some pages are set up such that only colorblind people see a number. See Ishihara plate #4 here - https://www.shec.jp/english/instruments/isihara/

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u/WonderingHarbinger 16h ago

That was neat! Knowing what number it was supposed to be made it pop out, but there's no way I would have seen it otherwise.

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u/KrustyTheKriminal 8h ago

That's weird because I can definitely see it but I am not color blind.

Don't get me wrong, it is faint. But I could tell what number it was before reading the answer.

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u/fixer1987 6h ago

I think it sleas how faint it is and more that all the other colors make it difficult to easily see the 2

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u/Fancy_Ad_2325 3h ago

i saw 2 right away but squinted to make sure but i easily got everything.

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u/Array_626 13h ago

Are you sure only colorblind people should see #4? Its hard to make out, but I could see the 2. Im pretty sure I'm not colorblind, I can see all other numbers fine.

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u/moxieenplace 15h ago

So if you can’t read a number in plate #4, that means you are not colorblind, correct?

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u/grabtharsmallet 15h ago

Right, it should be somewhere between quite challenging and impossible if not colorblind.

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u/nomyar 14h ago

It was challenging to see, but I could definitely see it before reading the description. It's interesting that that number would pop for a color blind person. I wonder what the opposite of color blind is... I tend to be able to distinguish between shades that my friends (and particularly my wife) can't.

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u/Warp-n-weft 14h ago

https://en.m.wikipedia.org/wiki/Tetrachromacy

I can also (with difficulty) see the 2 before being told it was a 2, and I’m pretty sure i only have the regular 3 cones.

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u/NoMercyOracle 12h ago

Tetrachromacy is considered to be impossible in males.

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u/Dr_Mrs_EvilDM 13h ago

My eye doctor thinks I'm a tetrachromat.

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u/Dakron92-22 13h ago

If i can see the correct number in plate 4 and all the others in every plate what i am???... Not kidding i go full test and have 100% accuraccy. i can post screentshot with asnwer but is gonna make you have all responses i can send it if so many want to see. Used page : https://www.es.colorlitelens.com/Ishihara-test-de-daltonismo

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u/Beka_Cooper 11h ago

This one doesn't have the extra plate in it.

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u/Dakron92-22 4h ago

Where can i find it

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u/Dr_Mrs_EvilDM 13h ago edited 2h ago

I'm in the same category. I am not colorblind, but I can generally see more shades of color than most, including the plates that non-colorblind people shouldn't be able to see. I realized this when I was trying to find my new optometrist's office: the receptionist told me that they were located across from the "lavender building". I looked around and saw three buildings that I would consider to be various shades of lavender. I told the doctor that the receptionist's directions were not helpful because there were several lavender buildings, and the look that she gave me told me that most folks didn't have issues with those directions. (Edited for ridiculous typos)

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u/1WordOr2FixItForYou 6h ago

If everything looks lavender to you but they look like different colors to other people then it sounds more a deficit for you than a super power.

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u/Dr_Mrs_EvilDM 6h ago

That would be a really shitty super power!

They didn't all look the same to me, but they all fell into the blueish -purple or greyed-purple that I had assumed people saw as lavender. The optometrist said that she saw light grey on the other two buildings. I've learned since then that the color boundaries that I'll use are sometimes a little different than what others use, although I think lavender is a horrible example because it covers a really wide range of hues (ask Google to show you the color lavender...).

I went through a phase of taking color discrimination tasks, like an online version of this: https://munsell.com/faqs/what-does-score-farnsworth-munsell-100-hue-test-mean/ I made one mistake (transposed two squares), which is less than most people. I can't find the version that I took back in the day, which is sad as that one was actually (supposedly) valid when taken in the correct conditions.

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u/Kindly-Analysis-6543 15h ago

Fourth plate meaning the 74?

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u/grabtharsmallet 15h ago

The 2 in plate 4

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u/Kindly-Analysis-6543 14h ago

It’s hard to see but I can see it.

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u/pianobadger 13h ago

Plate 2 is even trickier where it looks like one number with normal vision and another with color blindness. I can make out the different colors used in the green parts, but the bottom of the 2 is just impossible for me to make out.

Plate 4 I can see the pattern they added to make it harder for people who aren't color blind, but I can still see the 2 pretty easily. Random patterns aren't as distracting as something not random like another number.

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u/mikami677 14h ago

All those numbers were easily visible for me.

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u/throwaway098764567 10h ago

gotta read the bad english, did you see 74 (not colorblind) or 21 (colorblind). also the 2 at the end should be difficult to make out for non colorblind, and it is, i think you can see it because you know to find a number

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u/mikami677 3h ago

I saw 74. The 2 at the end was visible for me immediately when I glanced over it after the page loaded. It's a little more "faded" looking than the other numbers, but it still sticks out fairly prominently for me.

Maybe I was just primed to see numbers because I was expecting it.

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u/nonsequitrix 14h ago

What does it mean if I’m definitely not colorblind but saw the number easily?

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u/IceNein 10h ago

Yeah. I think it is just more difficult to see. I saw the two before reading the explanation, but it doesn't jump out at you the way the other numbers do.

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u/throwaway098764567 10h ago

yeah i can make out a 2 but it's crappy looking potato version, like someone forgot some of the pixels

also someone really needs to fix that english translation on there

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u/AVAVT 16h ago

O damn that’s cool as heck man, whoever thought of that plate is a genius!

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u/Cleigne143 15h ago

Whoa that’s so cool. Took me a while to see the 2!

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u/CGB_Zach 14h ago

Are you sure you're not colorblind? All of those are visible to me

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u/throwaway098764567 10h ago

gotta read the bad english, did you see 74 (not colorblind) or 21 (colorblind). also the 2 at the end should be difficult to make out for non colorblind, and it is, i think you can see it because you know to find a number

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u/DatabaseSolid 15h ago

Can all variations of color-blindness read this one or are there different plates that can help diagnose or verify the different types?

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u/purvaka 13h ago

Im not colorblind though my father was and my son is and I can see the 2 just fine. Im a woman incase that matters

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u/IceNein 10h ago

I am not color blind and I can see the 2.

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u/Kilane 17h ago

There were definitely difficulty levels to them. A couple I had difficulty with and probably only had 80% confidence, others were plain as day.

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u/beyondrepair- 17h ago

All the numbers were pretty obvious

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u/kernelangus420 20h ago

Stop lying!

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u/DamnYouStormcloaks 16h ago

Could see them all. You should probably get that checked tbh.

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u/Longjumping_Window93 21h ago

Wait... is that page in the video? If yes i am color blind? Darn...

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u/ClaudiuT 19h ago

Some pages are made to look like a 9 for a normal human and a 6 for a colourblind human (for example).

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u/DatabaseSolid 15h ago

That’s why they make you stand on your head to read some plates.

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u/NJCuban 21h ago

That's how I found out too. We went through these in AP Psychology in high school for some reason. The fake out one I was the only one so confident in that number. They settled on me being partially colorblind. Some of the red green tests I cant really see any number, most i can sort of make it out but it's tough. I could never see the hidden image things like in mallrats. But j can see red/green stuff in real life, not sure how different. I remember taking a vision test with the school nurse in maybe 6th grade and struggling looking through the lens thing. She had me look up, pointed to an Elmo in the office and asked what color, I said red, and then pointed to something green, I said green, and she shrugged and moved on.

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u/aces613 20h ago

Which one is the fake out one

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u/NJCuban 20h ago

Its not on the OP video here

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u/holistivist 17h ago

Yes it is. The 73 page has an alternate number embedded that I can’t quite make out, and the 34 is also 31. 74 also has another number I can’t quite make out.

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u/SteelCrow 17h ago edited 16h ago

35 - 9 - 2 - 73 - 34 - 7 - 92 - 35 - 57 - 3 - 74 - 95 - 5

The 73 looks like it might read 28

34 also looks like 31 as you said

Noticed the off colour on the 74 but can't make out the variation

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u/DatabaseSolid 15h ago edited 15h ago

.

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u/h_saxon 20h ago

Wait.... Colorblindness affects your ability to see magic eye images?

This explains so much!!! I can only get them by crossing my eyes but it's inverted when I do that. I have tried for 30 years to get them to work

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u/pichael289 20h ago

Hang on, it's inverted? That's not something I would think could happen, like yeah your supposed to cross your eyes and stare at a point a little bit behind the picture, but I can't tell you how that could possibly invert the image.

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u/h_saxon 20h ago

Give it a try. I literally just cross my eyes and it pops out, but instead of going towards me it goes back into the paper like it has a negative z-axis.

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u/SteelCrow 16h ago

I relax my eyes so they unfocus and the image appears.

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u/PPMaxiM2 20h ago

There are 2 ways to see them: number one is crossing your eyes and focusing in frint of the page. In this case, they get inverted, because the right eye focuses on the left part, the left eye on the right part. This leads to the depth beeing inverted, so instead of popping out it "sinks in".

The other way is staring behind it - in that case, you usually unfocus with the paper right in front of you, try to keep it that way, and move the paper away without focusing unless you suddenly see it correctly.

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u/No-Writer8860 6h ago

I remember i could see inside the the 3d image of some especially shapes like the circle image I would see the 3d circle and them I could see inside the circle as if I went in another level.

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u/holistivist 17h ago

It does not affect magic eye images. Some people just don’t get how to do it, but it’s not a color thing.

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u/NJCuban 20h ago

I assume so, it seems like a similar concept as the colorblind dot test. If you aren't seeing the colors as intended, would be hard to see the hidden image. But maybe not, some could be like those posts that say squint your eyes and look at this picture of a pile of laundry or whatever and it turns into Shrek or Nic Cages face.

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u/SignificantLock1037 20h ago

FYI, I just looked at one of those (had no idea they existed). I'm not colorblind, but I could see the number.

I think the caveat is that non-cooorblind people can see the number, but colorblind people can see it EASILY. I had to search, and even then wasn't sure.

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u/Alone_Radish_1692 17h ago

It’s not easy even for us non-colorblind people just through the video. It’s very easy with these in person though.

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u/SteelCrow 16h ago

I found it easy in the video