Understanding the Colour Blind Test - Including Self Red / Green Colour Deficiency Test - Dr Gill

[@DrJamesGill]

The self test, and introduction to using the test at home starts @ 11:03

[@Nizzynaenae]

Thank you so much! Deuteranomaly GANG 👁

[@ginebraman]

I scored 3 with normal vision. How bad is that?

[@isacson02]

A very interesting concept to try by yourself, I do wonder though if I may have been a bit sloppy or not, because when scoring I got 16. plate 9 was the problem here, I wrote down 21 but when you said that they correct number (for normal) is 74 i could clearly see it.

[@deveryday1]

@@Nizzynaenae to jojo's kkkkko

[@deveryday1]

@@ginebraman o

[@JappaB]

As a colorblind guy I just can't wait to get all of these wrong!

[@DrJamesGill]

How did you do?

[@JappaB]

@@DrJamesGill Lets just say that my knowledge of myself is spot on hahaha

[@Nicky392WB]

Right there with you buddy

[@juddmang1]

Same here!

[@AronBenderMedia]

Same!! Lol

[@randomcookieboy]

As someone with Red/Green troubles, I'm gonna start using "Color Deficiency" as a term a lot more often. Too many people, my parents included, talk to me about it like I outright can't see the colors.

[@DrJamesGill]

I agree, the number of times I get pointed to things “what colour is that?” It gets… tiring

[@edstructor666]

as spanish speaker it always felt that colorblind was way to reductive. In spanish we call us "daltonico" dalton as in john dalton.

[@nyx8476]

@@DrJamesGill my teacher actually tried this test today, it scared me cuz I can't see red or green properly, and my classmates asked me "what color is that"

[@Rinalicia]

I have never had someone go through and explain my colorblindness in detail! Thank you so much for helping me figure out what kind of deficiency I have!! Your videos are amazing

[@ronaldmcdonald8303]

It's because your eyes are genetically programmed to see in dim light, rods are more sensitive then cones. A lot of colour blind people have excellent eye sight in the dark. It's left over from the stone age before we knew how to light or start fires to see, especially in northern Europe. People with colour blindness are supposed to live in darker parts of the globe. I think at least if I'm not mistaken!

[@JappaB]

Im 100% down for more vision/colorvision related content!

[@DrJamesGill]

Ok. Maybe we can look at the genetics, and how the retina actually works

[@chuckoneill2023]

@@DrJamesGill Thanks. Looking forward to it.

[@emrekt22]

Would be wonderful

[@foxhound900]

When someone opens up about being colorblind they need to understand that they are subjecting themselves to a lifetime of people going, “Oh really?? What color is this then??”

[@DrJamesGill]

Tell me about it!

[@stevemiller.]

Green and red deficiency but i can distinguish solid red from green and know what it looks like. Its when they go into different shades that i just cant see it as what im supposed to.

[@tommyshaw2524]

Yep kids find it mind blowing my daughter and nieces ask me more than anybody has . Did have a geography teacher make fun of me and put me down in front of the hole class at school about it

[@105381000]

When I approach a traffic signal, I remember: top is stop; low is go; middle is, if you must.

[@dergereatl8796]

Same here. Not colorblind but i cant smell. Every time people go: smell this, or what doesbthat smell like?

[@dustinmiller6364]

i've already been diagnosed years ago but its makes me laugh every time I try a test and I score miserably. great video and i'd love a more in depth video on what caused color deficiencies.

[@Riotlight]

Me too, I scored about 3 this time 😂😂

[@ianchartier2622]

@@Riotlight same I just don’t see anything from pages 2-6 and then all the numbers after that were the deficiency ones😂

[@instinct3510]

@@Riotlight i got 7, 8 and 9 right. In the others i didn't see any number

[@jackworrall89]

When I was about 10 years old I kidded on I was colourblind so that I wouldn't have to take a maths test as it involved different coloured items on a table. The maths teacher even apologised to me and I couldn't believe I'd gotten away with it! Anyway, it turns out I am actually colourblind and it's limited my career choices ever since. I graciously accept the irony as its no less than 10 year old me deserves.

[@random_kid_on_youtube]

Bruh💀😂 How did you get to know that you're actually colourblind??

[@thekilla1234]

I was confused at first, I was able to see the numbers faintly in almost all of the cards and normally I can't see anything past the first 3. I figured out that the night mode on my monitor (that gives the monitor the warm orange tint) makes the numbers WAY easier to identify.

[@davel8686]

I used to just call myself “lazy” with my colours. I could never be bothered saying whether things are light or dark blue for example. I didn’t believe in purple that kind of thing. I learned at 25 that I did have some version of colour vision problems albeit mild. And thanks to this video I’ve learned I have deuteranomaly. And even a mild version of that it looks like.

[@JohnyDamas]

Very informative as always. As a colorblind myself, I appreciate this one very much, Dr James! (Strong) Deuteranomaly gang rise up!

[@dakeyress]

the number of images/exemples used to seriously/comically illustrate the statements are amazing!

[@DrJamesGill]

Thanks. Given these longer detailed videos, I’m trying to break up the video with examples - as it helps me learn

[@Martoune112233]

As someone who has struggled with red/green deficiency my entire life, please go into as much as possible about this topic, I would love to understand more about it. Thank you again for all that you do.

[@DrJamesGill]

We’ll definitely look at the retina and the genetics in the future

[@popelgruner595]

@@DrJamesGill Yes, please.

[@ronaldmcdonald8303]

You may be slightly colour blind, but I bet you can see excellently in the dark. Colour blind people are more sensitive to light because rods are more adapt at detecting dim light. It's genetic. You must have some northern European blood in you!

[@brittaniebrockett507]

This was some of the most relaxing and informative unintentional ASMR I’ve seen lol

[@Brains45636]

This is so relaxing. His voice is so soft and caring about his craft. Would make great asmr

[@xDaanster]

Thanks for the video doc! Would love a video about the genetics and cones. As a colorblind biology student, this sort of things interest me the most, even though I only have a red green color defect in my right eye (my left is fine, right got damaged pretty bad when I was a kid and left me with the colordefect).

[@DrJamesGill]

I’ll certainly put it on the list 😊

[@eddyperez3769]

Thank you this will help me win my court case for driving through a "green light"

[@TheFrenchMansControl]

Column three got me panicked for a second there! Great video!

[@Siviqs]

I sometimes get so bored i just watch anatomy or anything involving some form of a medical video, listening to Dr. James Gill while going to sleep is so soothing, the voice is subtle, comforting, I genuinely feel so relaxed.

[@dinosaur4141]

Agreed! Vision content is definitely interesting and oddly soothing. I was expecting to at least get a few as I don't consider myself that colorblind. I only got two right out of the first 20+, haha.

[@DrJamesGill]

Oops 😬 It’s always possible I’ve not colour corrected properly, as I can’t see them myself, so if you are concerned check with your optician 😊

[@penguinkaiser]

Whoa, I put on a video to learn about color blindness but instead I got an introduction that made me question reality. Good stuff

[@DrJamesGill]

🤣 always here to help

[@nazemabdrabo2584]

watching you is like watching bob ross draw am so happy to have found this channel!

[@Kaynstein]

This video is pretty dope. Thank you for sharing and clarifying the differences between color blindness and weakness. Channels like yours are a treasure.

[@DrJamesGill]

Thank you. Glad it has been useful

[@justdexter9799]

Usually i used to be awake this late for football matches or netflix but here im waiting for Dr.Gill's Premiered video...GG from india🧐

[@JGBarco]

8:54 - 9:10.... yes, 100000000% would love to see a video, or multiple videos deep-diving into all of that. Also, awesome job with this video. Incredibly well done and informative! Edit: thanks to this video i now know what MY particular deficiency is called... Deuteranopia

[@vyseskies]

I loves this. I only got one plate wrong, so it seems I have normal color vision. However the plates 22-25, all the numbers on right were definitelly weaker colors than the ones on left.

[@SnowyAspenHills]

I’m guessing that if you have scored high enough one wouldn’t even be presented with plates. I saw those plates as you did but does that mean there is a deficiency?

[@NORKonline]

This was super interesting! I've had the plates done numerous times, but I've never been given an explanation of how the scoring itself is done. I can't see full numbers in a lot of the plates (I can see parts of a number? Enough to make some sort of guess but nothing remotely close to the control plate) except for some of them where they're distinct and bold (like plates 14 & 15). For plates 18-21, I was able to see numbers in 18-20. Reminds me of being in the eye doc's office having to point out the number to my friend who accompanied me because I thought, "How come they can't see it, it's right there!" I see your bike gear as both yellow & blue at the same time but not green, if that makes sense. I try to avoid that color because it just breaks my brain to think about.

[@franfran6152]

Do you see yellow in one eye and blue iiib the other? Or how does that work?

[@JennySussex]

I've just turned 56yrs old and only recently discovered that I have a mild green colour deficiency. I came to realise this as I am studying an online art course, and discovered in one of the assignments that I could not perceive a subtle shade of green that everyone was talking about! So this caused me to look into why I was getting the lesson "wrong". Thank you for this video it has helped me to understand why I've been struggling with identifying the green shades. Also one of the art excersise was to mix both red and green in varying degrees. These all just looked like warm reddy browns to me even though I knew I had put green in the mix!

[@NinjaGS_]

Plate 1: 13:09 Plate 2-3: 13:14 Plate 4-5: 14:09 Plate 6-7: 14:28 Plate 8-9: 14:41 Plate 10-11: 15:04 Plate 12-13: 15:10 Plate 14-15: 15:16 Plate 16-17: 15:22

[@nesrinserip-calil8197]

This was a wonderful video. Beautifully put together, extremely well explained. Absolutely great! I hope you will bless us with as many interactive videos as possible. Thank you and wish you best of luck in the future!

[@JohnDoe-yc2qt]

I got all of them correct except plate 19. I could actually make out a "2" on that plate, but it was incomplete. I could only see parts of the number. To explain it better, imagine if someone drew or sketched the number "2" in a specific font style on a piece a paper using a pencil, then they streaked an eraser through a couple parts of it. Parts of the "2" would now be missing, but you could still make out what it once was based on what remained. That's about how plate 19 looked to me. I could see parts of a 2's shape, but it wasn't all there.

[@ItsMeVolatility]

Same here!

[@chuckoneill2023]

While I appreciate your care to differentiate between "seeing" and "perceiving", I take mild issue with it. "We" aren't just "wires in a box". My body is part of me, not just my vehicle. Edit: An interesting take on seeing/perceiving --- in the clip of you donning your riding gear, I perceived the gear as yellow, because you said yellow. Only after, when you said green, I paused on the image --- now I perceive the green.

[@DrJamesGill]

That is exactly how I see holly berries on a bush. I tend not to be able to “see” them with my “hardware” But when I have found them up close, my “software” let’s me perceive them a little more easily

[@seanwillis8483]

@@DrJamesGill I work with computers for a living. And this might not be as big a deal today. But I have found computer colors to not always be consistent. Especially with printers which still use a red, green, black, cyan color combination. Nowadays there probably isn't much difference. But I think there is still some difference

[@chuckoneill2023]

@@seanwillis8483 I work with printers all day --- the current full color standard is Cyan, Magenta, Yellow and Black (monitors use Red, Blue Green). I've never encountered the combination you mentioned. In any case, every printer has known limits --- the range of colors any given printer can accurately produce is called its "gamut", and any color which falls outside of that can only be approximated.

[@cdog7821]

Your voice was super relaxing in this video! Pls do more like this! 😊

[@Nick131081]

05:25 Please tell me that the jacket and the helmet are just slightly different or that the camera or display don't show the difference clearly. Otherwise I would've just found out something new about myself 🤨

[@markmccallum475]

Imagine going your whole life and only realising you're colour blind when you're a grown adult. That would make you so mad, you'd be seeing red. You assume.

[@flamingmuffin666]

I got a perfect score, so when I see your cycling helmet and jacket, they are the vague in between green and yellow fluorescent colour. Like a few shades more yellow than Granny Smith apples. If I was forced to say green or yellow, I’d say green, but they’re close. Helmet: 60 green / 40 yellow Jacket: 60 yellow / 40 green. Both have about the same shade/tone etc on fluorescent scale.

[@brunobio-marino2352]

All 25 right! Thanks Dr Gill, I now feel like having superpowers!

[@DrJamesGill]

Lucky you, honestly I’m a little jealous 😊

[@SwissTanuki]

Wow, you scared me for a second with the two last ones. Thanks

[@christallarico6922]

The production is great, love the transitions.

[@NabinSays__]

I never knew I had color deficiency. I had passed all the exam, cleared the interview for ATC OFFICER. Now it's over

[@jervisestacio]

A very detailed video. Thank you Doc! I can now defend to my work that even though I am a Deuteranomaly, I can always tell the difference between primary colors

[@Cypppp]

Does your color deficiency affect your work in any way? For example, when checking an eye through an ophthalmoscope, are you able to see all the colors needed to make an accurate assessment? Just curious. Great video.

[@DrJamesGill]

As a GP, colourblindness doesn’t affect me, but I could see other areas - perhaps anaesthetics where they use a lot of colour coded drugs they may need increased caution

[@seanwillis8483]

I think air force pilots would fail. They are required to have excellent vision. Also anything were safety is an issue.

[@Cypppp]

@@DrJamesGill thank you for the response!

[@ramingo9534]

Hello dr. Gill, as a colour deficient myself (and an ASMR fanatic too) I find this video very interesting. I have a question: I am mild deutan, I have little issues at seeing greens, I've recently bought a pair of glasses for colorblindness because be able to see colours is an important thing for me in my life. They surprisingly allowed me to 100% easily pass the Ishihara test, when without wearing them I got something like 20% correct answers. By wearing them on, numbers popped out like crazy, it went from seeing literally nothing to clearly see a number there. It was exciting but then things went very wrong: I went outside looking at things around me and I noticed that greens weren't brighter at all, I couldn't distinguish them better than before, and, above all, reds were very awful, they became a sort of dull orange, i. e. the STOP road signals, that are notoriously bright red, with the glasses on, became dull brownish orange. The same happened with rooftops, they went from being brown-reddish (the right hue) to a sort of yellowish light brown. That was so disappointing. I am able, without the glasses, to see many shades of beautiful red, I'm sure about that. But with glasses on, red/magent did disappeared. Those glasses allowed me to pass the ishihara test but didn't help me at seeing colours at all. How is that possible? I think they are just some sort of reddish filter that CHANGE the ishihara plates colours in order to allow me to see the number (but if so, the test become useless for a deutan), and when you use them in real life, they literally sucks. If so, they're a huge scam. I'm very disappointed because i like to paint and draw and I've put many expectations on that. On the other hand, I also tried Enchroma glasses and I have to say they work very well, but darken everything too much. I'd really like to know your opinion about this story...do you think that could actually exist some glasses that allow you to see colours better? (I know it's an inherited condition, so we won't be able to see the full colours spectrum) Thank you.

[@anastasianik7402]

Well, to be honest, the example with the helmet is not quite good, as this fresh green colour is very similar to bright yellow. I also thought first, it is yellow, only when the angle of falling light changed, I saw, it is grassy green, and I do not have any problems with colours. Anyway, it is interesting to hear a good explanation about such things, thank you)

[@Anonymuskid]

why is the vibe of this video so pleasently calm? i just came here because i have a hard time with red/green/orange/brown or blue/purple for example and now i'm fighting my sleepines, despite the inresting topic at hand.. huh, apparently i have deuteranopia and protanomaly. i guess i'll visit my doctor soon

[@crystalwoods7535]

I got 14 on the test. I have problems seeing some shades of red. I've been told that i have red/green colourblindness as a kid but i didn't know the specific type. This video has been very informative.

[@RipleySawzen]

5:27 In that lighting, they are pretty close to the same color. I wouldn't call the jacket green, but I'd agree with anyone calling the helmet yellow. Photoshop says there's only 10 more green in the helmet as well. So in this shot at least, the helmet IS yellow.

[@TresPro]

Ty for the video my gf had a good laugh with me at how she could perfectly see the numbers and I couldn't, I told her I knew I was deficient but this was a perfect example for her :)

[@JewishBettor]

dropping the comment mentioned in the video!! great content would love more!!

[@DrJamesGill]

I’ll certainly look at it, I’ve not tackled any genetics videos, and it might dovetail with some more retina focused topics

[@darksector_0675]

Why is this guy just so relaxing...

[@mattwroe4776]

I got refused certain flying jobs in the army due to this. Broke my geart wanted to do it since a young boy, stayed in the cadets did well at school, went to the fitness testing weekend and was offered a job in the REME as aircraft technician but was flight restricted, I know plenty of people don't make pilot jobs but I'd have liked to have tried I trained all my young life

[@DrJamesGill]

I only wanted medic in the RAF, but was barred due to asthma as a child. But was also told that my colour blindness would mean unable to fly too 😞

[@buffuniballer]

My optometrist gives me this test every year even though it's well documented that I'm a deuteranomaly. I'm not totally blind to green, but I do have a green deficiency. The amber and green traffic lights look similar to me. On the other hand, I find camouflage is less effective against how I see.

[@Guminisss]

I've done multiple colour tests before because i sometimes think i see colours wrong, but i score perfect usually so i believe i just have trouble seeing different shades of the same colour apart. Also i have to say your voice is very relaxing to listen to, it triggers my ASMR if you've ever heard of that

[@FoxVixen]

Well thanks to this video I found out I have Deuteranomaly. In games there are color deficency settings but I never knew what the names were, now I do, and now I can set the correct one. Thanks Doc!

[@DrJamesGill]

Glad you gained that! Have you found a benefit using those computer game settings?

[@FoxVixen]

@@DrJamesGill Yes! When in a fast moving scene the colours don't turn all in to one.

[@DrJamesGill]

That’s interesting. I’ll have to see if there is a colour blind option on Horizon Zero Dawn!

[@alexandreroberts8830]

I was diagnosed as colourblind "in family" as I had relatives who had deficiencies. As a result, I've never actually been officially diagnosed and don't know which deficiency I have (though I definitely have one as experience proves). Unfortunately, I think my computer monitor is messing with the test conditions. While I was unable to perceive the numbers between 10 and 17 (as expected), I was also unable to detect any numbers in 2 to 5 and 18 to 25. I should probably have it done in a clinical setting to be sure. This was a wonderfully informative video! It was great to learn more about the ins and outs of the Ishihara Test. Thank you very much for making it!

[@vanavern]

After knowing I have red-green deficiency for a few years, I finally get to know that it’s Deuteranomaly through this video. The doctor I saw didn’t even bother investigating further after knowing I couldn’t see the first few plates.

[@ljooni]

I think this video itself actually demonstrates the need for proper lighting to do this test really well, because as far as I know I have no colour vision issues but in this video I didn't really see the normal colour vision number on all plates but the colour deficient version, which was really interesting. My screen has yellow tint at all times, not just during the night, so it affects everything I watch.

[@carlb89]

This was a great video. I’d never had it explained properly to me before. Strong green deficiency here 😮‍💨

[@iainsmith1088]

I have known I am colourblind since the age of about 8, but not until this video did I know I specifically have a mild green deficiency. Thank you Dr. Gill.

[@Aerothorn]

As someone with protanomaly (and possibly more!) This is fascinating and I'd love more videos on the subject.

[@OwO_Stormy]

I got recommended this on KZbin. So I decided to watch. I love your voice ❤ I listen to a bunch of asmr, nice soothing voice

[@DrJamesGill]

Hope it was useful

[@joshyboy-gy3ml]

This video is very insightful as I have deuteranopia and it was very interesting to know about it, I've never taken to fully research why. I would like to see a follow up with a reason why this colour vision occurs

[@DrJamesGill]

I’ll try and put together a genetics video soon

[@SatishNatarajan]

I've always thought that my ability to perceive colours was impeccable. However, on the 12th plate, I could see 7, but it was hard to see 9 on the left side. I wrote the answer as 87 instead of 97. On the 19th plate, I was faintly able to make out the number 2 and you mentioned that only colour blind people can see 2 there. Should I consult an eye doctor? Out of the 21 questions I got 19 correct.

[@Fairly-odd-kel]

I had the exact same combination! So now I'm a bit confused 😅 because I have been known to just not be able to see certain greens but it's possibly something completely different from a technical colour deficiency

[@owl104]

I am still utterly stunned how the last few plates can show up as numbers for people affected yet not for people with normal vision. I can’t see where and how the numbers could even be made out! Does how does that even work!

[@palomathereptilian]

Idk why but I'm really curious about colour perception and colour blindness in general, even if I'm not colourblind myself But one topic regarding colour perception that I already saw sometimes in the internet (generally in kinda shady websites), and I really wanted an actual doctor opinion about it is if is tetrachromacy a real thing among humans, and how someone can be tested for tetrachromacy if it's indeed real (besides genetic testing) 🤔 Thank you so much in advance for your answer, loved this video a lot 🥺💕

[@DrJamesGill]

I think colour and colour vision is a excellent way of looking at ourselves and also at others, to recognise we are all different and yet similar 😊

[@cameronwilliams3599]

Colorblindness is an interesting phenomena, because without relying on outside sources, there's no way, I would be able to tell if I was afflicted with it.

[@floverdevel]

I REALLY ENJOYED this video !!! I would love to see more videos like this in the future 👌🏻🙋🏻‍♂️

[@olimarfunk]

Man, i always wondered why the charging light on my playstation controller looked green to me and NOBODY else! Thanks for helping me figure out that I have Deuteranomaly! (Ironic because green is my favorite color!)

[@DrJamesGill]

👍

[@giovannas.zechmeister2833]

I think that our favorite doctor just accepted that he is a asmr king.

[@Chazgugg]

Thanks for the vid, such a good explanation between colour blindness and colour deficiency. I now know I have a deuteranopia deficiency!!

[@Starshelle]

Thank you for this video. It made me think of my dad who had a red and green color deficiency. Watching this video, I think he most likely had some form of deuteranomaly since I remember he could differentiate between some shades of green and red but certain types he could not. He would put that out to me when he was gardening that he couldn't really tell the red and green apart very well from certain plants. I wish he were alive today so I could ask him more about it.

[@DrJamesGill]

We had exactly the same thing with my grandad who raised me. Every time there is an issue with the colourblindness at home my gran will ALWAYS say “Well, it was your PA’s fault, he was colourblind!” She’ll say it every. Single. Time 😂

[@Jaydoggy531]

Does a doctor or nurse need to take into account their own color blindness or color perception issues when examining a patient, particularly if they need to be on the look out for certain visible signs such as blotches on the skin, pigment issues on moles, spots on palms, or other external skin issues?

[@DrJamesGill]

Not really. The ABCD covers moles and there it is change in colour, not the colour itself that matters As for fluids and things - as a rule of thumb if a patient is leaking onto the floor, doesn’t really matter what colour it is… something isn’t right!

[@DrNoxin]

Deuteranopia here as well. I love your yellow helmet and the grey plant pot.

[@DrJamesGill]

😂😂 YES!!!

[@endersmith162]

This guy has a voice for bedtime stories. :)

[@kiwipics]

@DrJamesGill ... I'm a photographer when not working as a "mere" porter at my local hospital, and l've become an avid follower of your always interesting videos. I have recently taken up using a full spectrum converted infra red digital camera, and I have great fun experimenting with varying value NM filters, and the results are mind-blowing. PS: My Thyroid and Neuro examinations as a patient have never been as thoroughly as you perform them.

[@UnusedGamertag]

Thank you for helping me find the right word to describe my color deficiency

[@AHarmlessAnt]

I guess I need more testing for myself. A lot of the pictures, I could see nothing at all. Even on 22-25, I could barely see the left numbers on 22 and 24, but couldn't make out 23 and 25.

[@henrywahl5633]

I know you said that you have deuteranomaly, but I have to mention, the first plate is actually orange and green. I just wanted to mention it in case you cared!

[@AdamRoss30]

It doesn't seem to be explained anywhere, but what if you don't see the "abnormal" numbers on some plates too? How would those be scored/interpreted? For example, at the speeds this test is given (3 seconds each), I can't really see anything on plate 3. I have to squint and know the number before I can even see a 5. I've had this issue with the test before in a general exam and the nurse didn't know what to make of it. It wasn't the point of the exam so they just wrote down Deuteranopia (confirmed from the 22-25 plates) and left it at that. I actually assumed that simply getting the wrong answer was enough to confirm the color deficiency and didn't realize there were "right" answers for the abnormal vision. So what does it mean when you don't see the correct abnormal answers either? PS - This isn't simply an issue with my monitor/phone when I take these test. This has happened before when taking the test in an office with good lighting too.

[@SailorGerry]

I am a strange case. Have never been able to pass the Ishihara, yet have consistently passed the Farnsworth D-15 ('button test'). Also, strangely enough, have taken the American Optical 15-plate edition and when taking this test, can clearly see on the these plates two numbers: one that is 'correct' and also the 'incorrect' one. Being knowledgeable of the 'trickery' involved, of course, in being tested, I call-out the 'correct' number. It does not matter if the order of the plates are changed or if some plates are removed (this to confuse candidates during testing, in case that there is suspect of someone memorizing the sequence of the plates), am always able to correctly name all the plates. I always request that the examiner to take the test booklet to a natural light source - as a large window. Same if doing the D-15. What is the difference between a 'saturated' and 'unsaturated' D-15 test? In the past was obliged to take a lantern test. That's too long a story to outline here, nevertheless again, if one is cognizant of certain cues, procedures, yes and the 'trickery' involved, one might pass this test.

[@whiskeyadams1863]

This is a great video and very comprehensive. I'm not colour blind or deficient but I am trying to learn for a friend. Thanks

[@OMCbuilt]

I'm 1 for 21. Strong Dutan. I can barely make out the numbers on the left of the last 4. Has anybody tried those glasses that claim to help color blind people?

[@chuckoneill2023]

Some deep information on the genetics would be very interesting. The very superficial information I recall from grade school is that the genes reside on the X chromosome, making it a mostly male issue. Would love some expansion and/or correction. Also getting caught up on our current level of understanding . ie. Are there really some women who see ultraviolet?

[@LadyEmilyNyx]

Correct. That's why there are comparatively few colourblind females. One bad X won't do it, they need 2. For example, I am colourblind. My mother is not, therefore she must carry 1 bad X, and one good X. My father is colourblind, thus we know he carries a bad X. My sister COULD have been colourblind, but she got lucky and got the good X from our mother. Her partner, is NOT colourblind, therefore her SON could be colourblind, but her daughter could not (because she would receive a good X from her father, regardless of which X my sister passed on)

[@chuckoneill2023]

@@LadyEmilyNyx Similar to my family. My late father was red/green color blind. None of his children were, but my nephew is.

[@gamerkobe6627]

I noticed that the Ishihara book you used for the test was labeled to be a 38 plate edition, yet during the test, you only showed 25 plates. Are the other 13 plates used for the more rare cases of color deficiency?

[@lylavati]

That was very interesting. I thought very black and white about that topic, but there are many greys (of course lol). Colourblind is not seeing no colour at all. The test was confusing. I had everything right, struggled a bit with plates 12 and 13, but got them right aswell, and saw a number 2 on plate 19. 😄

[@cucurupiku]

Thank you so much for such detailed information and even including the test. I learnt a lot. I came to here because I failed a color blind exam while all this while I had no issue with colour blind tests. It bothered me so much and I found your video and did the tests. I'm completely normal. Scored 17. So I wonder why the institution failed me.

[@DrJamesGill]

There are other variations to the tests possible, and as mentioned the conditions can affect the testing

[@Pam_Beesly]

I have never been diagnosed or tested for color blindness. My dad is , and as a female people told me it wasn't common and didn't believe me when I said I couldn't tell some colors apart. I cant make out most of these.

[@claudinesuchocki8633]

Yes, I would like to understand the causes of color blindness. My daughter sees green as "tanny-brown" snd red as "tanny-gray". I would like to understand why. Thank you.

[@kittenastrophy5951]

I think technology in the future can help relief this problem. just make a special lens that can do optical correction and put on a normal eyeglasses.

[@DrJamesGill]

Well there are glasses that can make colour blindness issues milder - but changing the appearance of the affected colours

[@ianhodgson221]

When using the Ishihara Charts note should be made of both the edition and the printer as variations in the reproduction of the plates can vary , in some cases widely. Better tests are either the City University Test or the HRR Test.

[@DrJamesGill]

Thank you - That’s a very good point 😊 As a GP, we’re particularly limited, but if there were further concerns, or someone wanting a pilots license for example, I’d certainly refer them for more formalised testing

[@ianhodgson221]

@@DrJamesGill No problem. The Ishihara test tends to be specified by various bodies as the "go to test" but to be honest it has in many ways outlived its usefulness ,a bit like the Snellen Chart, (LogMAR is far better) but it is easy to use and is "understood" by most clinicians. I know what you mean about being "limited" I remember some years ago a GP telling me that his ocular education at medical school consisted of being told what book to read, but not to bother as there won't be any questions on the topic in the exam. He then told me which book he had been told to read and asked my opinion of it. I think my reply slightly shocked him as the view at my Uni was "its useful for propping up a wonky table". In case you haven't guessed I'm an optometrist.

[@DrJamesGill]

Honestly I don’t recall clinical education on HOW to examine the ear - full stop (Lot’s of lectures on ear pathology, and treatments, but not HOW to do it - similar for eyes) At med school, honestly you need to be lucky enough to get the right placements Hence I’ve VERY slowly trying to go over all of the areas I wish I’d been taught. I suppose this is both one benefit (and risk) of being a GP, I’ve a LITTLR knowledge on most things, but lack the depth. So I can approach the topics easily, but there will be things I don’t know I don’t know. Although again, for medical school baseline videos, I think that’s probably better than just saying “read a book” 😊 Would you expect a GP to be familiar with the other tests, eg HRR you mentioned?

[@ianhodgson221]

@@DrJamesGill No I wouldn't expect you to be familiar with them, I have been told I can bore for Britain on somethings like this. I thought I would mention them as it is good to be aware of other possibilities, and that there are limits to the test of choice. What I would suggest is if you what any information , or help, with eye information ask a local optometrist for help I am sure that most will be happy to help. I know I would.

[@chadsmith1200]

Is there a Dr. Gill full head to toe physical exam video that lasts at least 20 minutes anywhere? The longer physical exams are my favorite.

[@raawoo]

I thought plate 8 was 13 and plate 9 was 71. The plates 10-17 were all just coloured blobs. Like, I can tell there's something there, I just couldn't really tell what. Does that make me colourblind?

[@bbvetromile]

I’m a woman without color deficiency, but when I apply eye makeup I have to do it so close to my eyes that I use a bicycle mirror. I see each eye individually. That’s when I noticed that each eye sees color differently. One eye sees more red and the other sees more blue/green.

[@David-jx4gw]

I passed a colorblind test with a filter simulating all 3 of colorblindness, so I think my color perception is pretty good. Failed almost every card with a black and white filter.

[@tygonmaster]

I could see every play perfectly fine except for plate 12, which looks fuzzy and kind of strange. My brain kept wanting to say either 37, 97 or 87 and it's kind of weird how it's like partially connected on the left side there. Every other one was incredibly easy. It is that specific one that is just strange to me for some reason. I think it's less a color issue and more the fact that I have a nystagmus, which I have managed to completely infuriate many an eye doctor with over the years I imagine. I also always fail every driving test at the DMV because of it. Truly a blessing. I truly hate it.

[@Vader-23]

Well done on Bear Grylls island James. Being colour “deficient “ myself, I find this all very interesting.

[@brandonmoller8309]

You have no idea how many people dont actually know how it works and ask me if I can see colour at all

[@Chief-Solarize]

I remember taking this test at MEPS. The control page was at the back when I took it. It was the only page I saw. They still let me join the Airforce but my jobs were limited.

[@matthewwilliams3789]

Amazingly I have discovered from this video I have a deuteranomaly. 31 years old and never picked up on it until I did the test

[@kingzack5164]

This is unintentional ASMR thanks!