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Is it me, or do the protanopia (top right) and deuteranopia (bottom left) images look identical? If I’m colour-blind this would be a weird way to find out.
by erpellan 4y ago
Is it me, or do the protanopia (top right) and deuteranopia (bottom left) images look identical? If I’m colour-blind this would be a weird way to find out.
- v413 4y agoYep, looks like they are the same.
- gubby 4y agoThey look identical to me too, but I know that I can perceive RGB hues.
- jiggawatts 4y agoThey look identical to me too, and I'm 100% certain I have full colour vision.
- throw827474737 4y agoThis is more a test for reading-blindness than color-blindness :D
- amelius 4y agoSame here, and I just took an online test to verify.
- OJFord 4y agoAll except the blue-yellow (bottom right) images look the same to me, in both examples. And van Gogh's 'Starry Night' 'filtered to simulate colour blindness' looks the same before as after. I am colour blind. Now, if only someone could filter it to simulate non-colour-blindness for me, so I can see what they see!
- lupire 4y agohttps://www.allaboutvision.com/conditions/color-blind-glasses.htm https://www.allaboutvision.com/conditions/color-blind-glasse... allaboutvision.com/conditions/color-blind-glasses.htm
- OJFord 4y agoI'm curious how well that can work, but not '$200 to $450' curious. I wonder how many people actually have enough of a problem with it to get these - it's not like you're suddenly going to be allowed to fly fighter jets after all.
- OJFord 4y agoAlthough I suppose if you need prescription glasses anyway, why not. Fortunately I don't need short/long corrective lenses, so there's no way I'd wear glasses just for improving colour perception a bit. Even if they were free (I'd try them as a gimmick, sure, I just doubt I'd want to wear them regularly).
- hnbad 4y agoI'm colorblind (strong deutan) and bought a pair of EnChroma sunglasses after trying out a simpler system that pretty much just used a combination of colored lenses (the lenses would have had to be two different colors and would basically look like 3D glasses). Allegedly the EnChroma glasses work better the weaker your color deficiency is (i.e. they work worse the worse you already are at telling colors apart). For me there's a pronounced effect but it's mostly through shifting all colors more into violet and yellow. Using them was the first time green LED traffic lights appeared "saturated" to me although yellow traffic lights appeared a bit darker than normal. A clear blue sky appears vibrant but with a noticeable violet tint. Flowers look neat as reds and purples "pop" in the same way pure blues and yellows do normally. I can tell whether lawns are healthy or dried out. But they don't "fix" my color vision. Of course not. They can't add color where I'm physically unable to perceive it. They wouldn't allow me to pass most colorblindness tests or operate machinery that requires normal color vision. They can however modulate some parts of the visible spectrum so others stand out more. And they're really good at that. I've had my EnChroma sunglasses for a few years now and I use them instead of regular sunglasses in most situations (except when I expect they might get damaged). I would probably buy them again. I considered buying regular EnChroma glasses but I've heard the effect isn't as strong and as I'm already not in the group benefiting the most, I worry the effect wouldn't be good enough to justify the price tag. YMMV. EDIT: I'm fully aware of the dramatic reaction videos that made them popular all over social media for a while. I saw them after I found out about EnChroma and after I had already decided to give them a try but before I was able to do so. If anything, these videos made my experience of first using them more underwhelming. Yes, I could "see" purple in a different way than ever before, but knowing the reaction videos and knowing the person I was with knew them almost triggered a form of imposter syndrome because I simply didn't experience the overwhelming sensation the videos suggested I should perform.
- itazula 4y agoBlue-yellow? The bottom right image of the parakeet appears to be black, blue, gray, and white, with a blush of pink near the beak.
- OJFord 4y agoYes, sorry, I meant the one simulating tritanopia - blue-yellow colour-blindness - not that the image itself was blue & yellow. (It's just greyscale to me fwiw, as someone non-tritanopically (I've never been sure what, nor the optician, doesn't seem to be cleanly proto or deuteranomoly, perhaps some combination?) colour-blind viewing it filtered to simulate that. On some hand-wavey high level I lack the ability to see what's left after what I can see has been removed, I suppose.)
- darkerside 4y agoThose images, top right bottom left, actually look really cool. They appear sepia toned, which is a fairly common filter effect that invokes nostalgia. It's almost neat that you might see everything that way. (I'm sure it doesn't always feel that way)
- OJFord 4y agoSepia looks different to normal to me too, so no, but that's interesting!
- gattilorenz 4y agoThere are multiple apps that claim to do it using the phone camera… but I’ve never tried them, so no recommendation.
- limbicsystem 4y agoWe made this once: https://www.vischeck.com/daltonize/ https://www.vischeck.com/daltonize/ But no one seemed particularly interested. Let me know if you are...
- deleted 4y ago[deleted]
- scapp 4y agoIt's because the cone cells connected to those variants of colorblindness have very similar sensitivities to wavelengths. Check out this diagram: https://en.wikipedia.org/wiki/Cone_cell#/media/File:Cone-fundamentals-with-srgb-spectrum.svg https://en.wikipedia.org/wiki/Cone_cell#/media/File:Cone-fun... With protanopia, the L cone cell is affected. For deuteranopia, it's the M cone cell.
- debugnik 4y agoIf you were colour-blind, the full-colour image (top left) would look nearly identical to one of the other three.
- danielheath 4y agoIf you were totally colour-blind (by far the rarest sort), I suppose it would.
- debugnik 4y agoI guess by totally you mean the strongest case of a particular kind of colour-blindness, not achromatopsia. Fair enough, I could have said similar. I just wanted to clarify which image is the one they should compare against. However, if colour-blindness is not so strong for most people, then these articles should depict a lesser form of colour-blindness as well, to more accurately convey the experience. I don't think I've ever seen a post on colour-blindness that did.
- OJFord 4y agoIt looks identical to both protonomaly and deuteranomoly simulations to me. I am colour-blind, but not 'totally' if you mean grey-scale only - just that certain shades merge together/look like the wrong colour.
- mort96 4y agoThey look very clearly different to me, but the difference isn't big. I made a gif of the starry night images: https://p.mort.coffee/jR5.gif https://p.mort.coffee/jR5.gif To me, one of the images clearly has a yellow color where the other image has a green-ish color.
- OJFord 4y agoIt took me a while to see anything other than resizing - but yes, the larger one is ever so slightly greener to me too (I am colour blind, couldn't see a difference side by side). And I watched the gif prior to reading your description of the difference - I experience this strange phenomenon sometimes whereby the colour of something (or the presence of different colours) morphs in front of my eyes, after someone describes it or claims that it's there. (Red and green bars on a chart for example might all be the same, then someone says 'blah blah in the second red bar' and all of a sudden I can distinguish them, see the red or green that wasn't there before. Or a bridge in London that suddenly looked green when I was told it was called Green Bridge.) I wish it was easier to learn more about it, because I find that kind of fascinating (and mildly 'scary'!) - must surely mean it's not just about the eyes, but my brain is smoothing over some rough edges as though small red/green differences are assumed to be wrong, but if someone confirms them then the parameters are altered.
- tkgally 4y agoI’m color-blind, too. I can see only the resizing difference in the gif; the colors look identical to me. I haven’t ever experienced the reperception-by-suggestion phenomenon that you describe. But I do think that, when I was young, I gradually became a bit better at distinguishing and remembering colors than I had been as a child, perhaps because having been told that I was color-blind made me pay more attention to colors. “Purple” was a mystery to me when I was ten; by the age of twenty, I could usually distinguish it from blue.
- OJFord 4y agoIt's extremely subtle to me - the bottom horizontal stream gets very very slightly greener when it gets bigger. I noticed it first because the starry swirl thing above it, bottom right of the big black thing, seemed to change shape as though the actual brush strokes were different, bit more of a classic star shape emerges. But it's extremely slight, more like the 'what a colourblind person would see' filtering is imperfect than that I can actually see the original.
- lupire 4y agoThe deuteranopia is very slightly more orange in some squares. The visibility probably depends a lot on your display color calibration and how fil spectrum your ambient light is. Incandescent "soft white" and modern imitations, common in household lighting, is usually yellow/orange.
- ObscureScience 4y agoI overlayed them in Gimp as layers and did A/B comparison with other people and neither could detect a change.
- lupire 4y agoThanks for doing the "obscure science"! Perhaps it was variations in my lighting or optical illusion effects.
- plasticchris 4y agoMy college roommate found out when I showed him a joke tshirt with a message in the circle of dots. He thought the joke was that there was nothing there and I was messing with him, then spent an hour on Wikipedia figuring out exactly what kind of color blindness he had.
- gsich 4y agoThe other pictures are better for comparing this.
- ObscureScience 4y agoThey are identical to me. I have never showed signs of color blindness in such tests.
- senectus1 4y agoyup the same to me.. I even overlayed the two images over each other and flicked back and forth between them.. they are identical
- steanne 4y agoseems normal: different mechanisms creating almost the same symptoms. a few different sources from googling protanopia vs deuteranopia: > Why is protanopia like deuteranopia? Red and green colorblind deficiencies (deuteranopia and protanopia) are very similar, as these cones often overlap. Therefore, protanopia and deuteranopia can often eliminate the ability to see both red and green, showing the world in vibrant blues and yellows, as well as very similar browns, oranges, reds, and greens. > People with deuteranomaly and protanomaly are often incorrectly diagnosed collectively as ‘red-green’ colour blind because both types generally have difficulty distinguishing between reds, greens, browns and oranges. They also commonly confuse different types of blue and purple hues and many other colour combinations. > The answer is that dichromatic colorblindness is imitated by assuming two of the three types of receptors receive the same light input. In deuteranopia, for example, the assumption is that the neural receptors expecting medium (M) and long (L) wavelength light are both receiving signals from cones with long (L) pigments. This results in the yellow you noticed. Note also that deuteranopia and protanopia don’t result in exactly the same hue of yellow because of the difference between their peak sensitivities. In one case it is assumed all signals are coming from L pigments and in the other all from M pigments.
- jericho_jones 4y agoI found a setting in chrome the other day that allows you to simulate the 3 types mentioned in the article. Seems like there is more variation in chromes filters than the ones shown in the article. BTW they look the same to me too. In chrome: console > rendering > emulate vision deficiencies
- deleted 4y ago[deleted]
- zenith035 4y agoYeah - it looks identical to me too. I already know I am colour-blind but not exactly sure what type.