Do colourblind people see traffic lights differently?
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- Опубліковано 5 лип 2024
- Today we talk about whether colour blind people see traffic lights differently.
We talk about
the difference between colourblindness and colour deficiency
whether traffic lights appear any different
what jobs colourblind people are not allow to have
do colour blind glasses (like enChroma) cure colour blindness
In Québec, Canada, traffic lights have different shapes added to the different colours. Red is square. yellow is diamond and green is circle. It's a little thing, but it help people with colour deficiency.
I wish we would implement this down in the US. Routine traffic lights aren’t an issue for me but when I encounter a blinking light at a distance I can almost never distinguish between yellow and red. On more rural roads where the light will just have one bulb rather than the typical three it’s literally impossible for me to distinguish. I’ve pissed off a lot of people behind me over the years because I often stop at a blinking yellow. Shapes in the lights would be amazing
@@pinchtwo654 hello have u obtain driver license or CDL
But it’s harder to see than just to see the colours, especially when it is raining, or at night. During sunrise and sunset, the sun is too bright that even if u can see colours, it’s hard to see which one is actually on.
Great video Antonio :-) I'm quite severely colourblind... people used to infuriate me by holding up say a dark blue jumper and going "Hey Dave, what colour is this", and then looking baffled when I say Black. It got so frequent growing up in the 90's, and so annoying in my 20's that I started to mess with people by going to the other end.
There's no greater sinister fun than someone holding up a dark coloured something, asking the question, and you fire back with a straight face "Yellow"... they'll spend weeks trying to convince you it's whatever colour it is :-D
But in all seriousness, I've often described my colour defeciency using a Dulux paint colour chart.... say myself and a friend go into the hardware store looking at all the different shades of paint, they'll see tins of blue, red, green, teal, magenta, emerald, baby blue, deep red and lime...... I see 3x red, 3 blue, 3 green; they're all the same, so I could pick up three tins of different shades of blue, paint my walls, and to me they'll be the same, but to the average person my house will look rather odd indeed.
I'm light sensitive to the point of getting migranes. The brighter it is, the more oversaturated colors becomes. Sometimes when I leave work in the morning, it looks like all the lights on the stoplight are lit. I'm just like, "if they're all lit, that means I go. Right?" I do have good night vision. At the point most people say they can't see, that's when my vision starts changing to shades of grey. Still, much prefer driving at night, except when cars drive toward me and everything turns white. I can see after they pass me, though. Not exactly sure what this is called, but I just refer to it as day blindness. I have a doctor's note to wear sunglasses at work, but I feel like just saying I'm light sensitive kind of diminishes my situation. I wish I knew more about how my sight works, so I could explain it better.
Sounds like your eyes let a lot of light in and don't close off quickly.
I have the same problem. A bright light, such as the sun reflected off a mirror, can cause me to have a migraine. When I was young, these headaches were debilitating for hours, many, many hours--wall-banging pain. As I grew older, I would still get a migraine when seeing a very bright light, but the severity of the headache has diminished, thankfully, but I still get the visual aberrations, such as blind spots and a shimmering in the corners of my visual field. This is still debilitating, just not as painful. Photochromic lenses have been a real Godsend. I could get by with very good sunglasses in my youth, but as I've aged and need prescription lenses photochromics are a necessity, as are good clip-on sunglasses for driving.
Wear sunglasses
@@CountingStars333 Thanks for the advice, but we're not stupid. I wear the strongest and fastest reacting transitions that are available and I wear magnetic, polarized sunglasses over my glasses when I drive. These do help, but when a flash of light can happen in the blink of an eye, when it is least expected, the damage is done and there's nothing that can be done about it.
I'm mildly red/green color deficient and and yes, traffic lights are usually in the same position but there are a few other things you may not have considered about stoplights and colorblindness.
1. At night from a distance, when I can't see the position of the lights, it's nearly impossible for me to distinguish between red and yellow (not a problem because you should stop at both) However when it's the difference between a flashing red and a flashing yellow, that is an important distinction because one is a yield while the other is a full stop.
2. When a stoplight only has one bulb thats displays all three colors, this makes things even more challenging.
3. The green light is the easiest for me to tell apart from the red and the yellow, BUT the green lights often are indistinguishable from the white street lights, making it difficult to tell whether or not you are coming to an intersection and needing to be more cautious.
Again, the main problems arise at night, during the day there's not usually much of an issue as long as it is a stop light with individual bulbs for each color.
Otherwise great video!
YES!! I hate the flashing yellow/red lights. do you have a solution? just got my license so i don't know how to go about this
This is exactly my problem too
I test positive for red green colpurblindness, and you are talking bollocks. I have absolutely no problem distinguishing between red and amber lights. The difference is very obvious. The green light does look white to me, but once again, it's impossible to mistake it for a street light. And this is coming from someone that basically failed every number in the ishaira test
@@AverageAlien you’re gonna be astonished when i tell you everyone experiences different kinds of color blindness and to different severities
@@wadyz tell a lie, after this, I went to double check if I can actually tell the difference between red and amber. Turns out, when ignoring their position, they look identical
The traffic lights always confused me when growing up because they always looked orange - yellow - blue/green instead of red - yellow - green. When I drive, especially at night, the "blue" light is easy to distinguish, but the yellow and "orange" lights were a lot harder, which was pretty annoying.
I also find it kinda cool how almost everyone could see that "7" pretty clearly and all I see are a bunch of dots. Like you guys could have said anything was in that circle and I could believe you 🤣
There’s also the ones that we color blind people can read from but the normal people see a totally different number. That’s cooler to me.
@@RealNameNeverUsed "There aint any 7's in that ring" was my thought haha.... i hate to play these with my mom :/ shes like "oh yes i see that 8 you see here but it really is supposed to be 5" like, what the hell?!!!
As a Dr. you didn’t mention that SURGEON is another job that requires good color vision. I’m a red/green “deutan” - I can tell you that blood is very hard for me to notice against other background colors. Even red nail polish is difficult for me to see against skin. It freaks color normies out to see blood lol. But you would need that PLUS other color sensitivities to work on someone.
I have mild red/green and got a pair of those color correction glasses. It wasn't world changing. It heighten contrast with dark colors, and I was able to pick up subtle reflective colors like green bouncing off a white background, but nothing too different without wearing them. Other users may vary so don't be discourage.
Well as he said, logically there's just no way for them to actually recover anything. It's more like putting a color filter on a screen that can't display that color. The best it can do is use a filter that pushes the colors they confuse slightly differently. As he said, people with those glasses perform no better than those without them so it literally changes nothing. It's about like how I have orange sun glasses. Yes after wearing them for a few minutes the grass takes on this really vibrant green shade, but it doesn't make my eyes see a shade I couldn't see before.
I'm color deficient myself but didn't actually know until I was 13.
We were doing chemistry class and had to write down which of the 2 cylinders became the darkest...
I wrote down that neither did, while (according to my teacher) the difference should have been pretty obvious.
Although, it doesn't really affect me in day-to-day life so people don't realize I do have a color deficiency until I tell them or look at them like "but these are the same?"
The same for me & I also found out in my 11th grade Chemistry class.
Helpful video. We found out our young child has a color deficiency and we're doing our best to understand how they see the world. It's hard as a parent when we comment on how pretty a sunset is, soak up a field of pink roses, or enjoy a breathtaking view of changing tree colors in autumn, when our kid can't appreciate any of it.
old old traffic lights that have faded to the point that the green is yellowed from age, and then lights are turned on their side for clearance. those are fun to distinguish
Also cook/chef is out of bounds for us color deficient folks unless you want to give people salmonella. Artist is out of bounds for us color deficient folk too if you like “pretty colors.” The main job in which color deficiency is a competitive advantage - US Army sniper.
Good video! I am strong protan with some green deficiency as well. My approach to traffic lights (been driving for 54 years, in the US, UK, and Europe) is that red is darker than yellow or green….hence red is easy to tell from the other two. Green looks white to me and I have a difficult time distinguishing green lights from many street lights at night. But, I don’t have to worry much about it as I can go if it is green. I can tell yellow from green so if I see a red or yellow light I stop. Position of the lights is a huge help as well.
I am also a commercial pilot and many years ago was able to take and pass (barely) the FAA administered light gun signal test and had my night flying restriction removed. The current test is much more stringent but I am grandfathered in. I am able to fly without issue, but night flight is a bit more difficult.
I just bought a pair of enchroma glasses sun glasses. They boost the reds, browns and yellows for me and are pleasant..but it was not anything like the tearful moment I have seen in the ads. I was going to return them (I can certainly live without them at this point in my life) but they are excellent sunglasses and decided to keep them.
Electronics are completely out of reach for me. I couldn’t be a doctor or policeman either. Getting dressed can be a real challenge. I have to be really careful what I wear and tend to stick with grey or black suits, blue or white shirts, conservative ties, and avoid odd colors like the plague for casual dress. Generally, my wardrobe is bland otherwise I wouldn’t be able to get dressed in the morning without a “wife” check. Otherwise I would look like a clown.
It was nice when I was in the Navy. They told you what to wear and everything was either blue or white. Everyone looked the same.
People with normal color vision don’t know how lucky they are. I hate being color blind.
Regarding traffic lights, if you have light sensitivity, it can be worse because the brightness of the sky behind the light will wash out the traffic light altogether. If you've seen videos of cars with cameras in them and they're coming out of a tunnel, the brief moment where the screen goes white as the camera adjusts, is what it's like for me. Everything is over-exposed. And at night, if driving and I come upon police cars with their brighter-than-the-sun lights flashing, I can't see past them. Who knows if a cop is standing in the road, or there's some debris from a crash? Those lights don't need to be THAT bright.
Definitely.
Thank you for a great video I tell my husband he was color blind but he is not he has color deficiency love how simple your explainations are.
Im colorblind and am so happy i watched this cuz i almost bought those glasses. I would love to see a detailed video on them and more on my disability so i can understand myself better. You put the information in such an easy to understand format that is also fun to watch so i dont lose focus with my ADHD. i truly love that.
I've got tritanomaly, and basically my eye doctor said that it probably has no bearing on my life. Also, since I'm female, almost no one believes me 😮💨 it would be kinda cool to see a video covering the different types of color deficiencies (I'm new to your channel so maybe I just haven't seen any yet)
that's only red-green colourblindness is it not? The rarer tritanomaly is not on the x gene or related to sex disposition i don't think.@@HiddenRealm
Thanks for posting this.
My comment is regarding 4-way or single traffic beacons that utilize red or yellow. I was diagnosed as Red/Green colorblind early on and flashing traffic beacons, especially under less that full daylight are a problem. Both red and yellow beacons appear the same color. (especially the pixelated LED ones) under less that full daylight. The MUTCD - Federal Highway addressed this some years back by requiring a stop sign for any approach that has a red flashing beacon, but when in rural or unlit areas at night with a flashing 4-way beacon, older stop signs are not seen until you’re right on top of them.
Hey Antonio! great video on the subject. I have Deuteranopia and I struggle to see the brown ball on a snooker table with all the reds on it. I have tried colourblind glasses and they worked on the Ishihara cards but not every one of them..I maybe got lucky with the match so they sort of work. the green traffic lights don't stand out too well for me but they have started using brighter LED green lights with a slightly different shade, They stand out really well for me..its sort of going towards a bluey-green. (turquoise) Blues and purples pop everywhere!
Great Video - I always wondered how Color blindness worked - Thank you!🙂
I'm RG colorblind. I've done electrical and electronic work all my life very successfully. Bright lighting and magnifying glasses have been the key for me. Low light conditions exacerbate the problem.
those resistor codes though. so annoying! brown, red or black is anyone's guess, same with blue and violet. Thankfully multimeters exist.
7:05 - for that reason the most important wire - earth/ground is always bi-color (yellow and green), so even a person with colour-blindness differentiate it from other wires.
At least here in the US, green has blue added to it to help out. Yellow is brighter (I think). Problems still happen with flashing single lights (is it flashing red or yellow). You can always stop and go if safe, but other drivers aren't always patient at that. Very old traffic lights (think small one light towns) with lights more than 100 years old sometimes have red and green right next to each other (right and left). Those are still a pain because nobody knows what the original standard was (red on left or red on right).
Thanks for the information!
I know someone who has achromatopsia. It happened from an accident while he was in the military. Some people don't believe him when he says everything is in black and white.
They also ask questions like, "If you can't see colors, how do know what color crayons are?"
His irritated response is, "Because I can still read labels, duh." 🤦🏼♀️🤣
Great video! As an optician, i would love to know how these glasses work. I never encounter someone with one yet.
Hello
Hello Antonio,
Can you please share gear settings? Camera 📷, mic 🎙, lighting💡…
i would love a video on the colorblind glasses
Have achromatopsia myself. Fun condition, black and white vision with the feeling of having a flashlight pointing right in your eyes most of the time except indoors and if it's not brigth enough. Slight nystagmus too with 10% of normal vision, can see only the biggest letters on test and barely so.
If you by some miracle see this comment and have similar condition, try 98% filter alpinist sunglasses, it's really great compared to any other kind.
As a kid always confused me why people complain tv went black and white, back when we had tvs like that, nothing changed for me.
This video raised a few more questions than fully answering.
For example, an eye doctor should not say that those colour deficient glasses does not work or barely work.
Obviously those glaasses work and do wonders with some people.
7:50 I am mild protan. The Enchroma glasses allow me to see natural colors better. The subtractive nature of the glasses makes them effectively sunglasses with an even white balance. I have a pair since Aug 2015, and very happy with them, especially in spring and fall. You are right that they do nothing for colorblindness test, but those are just contrived examples of color combinations
I would love a video on the glasses. My son has a colour deficiency and I have always wondered if they could help him see colours more like I do, or if they are actually a scam
Interesting. Explains my mother. She apparently has issues differentiating between some hues of color.
Amazing
I failed a colour blindness test 20 odd years ago back in Ireland when I was starting my apprenticeship, I only got 8 out of 24 on that dotted number test but was sent to get a contact lense and after having it made for me I got 18 out of 24 on my next try. For some reason those kind of lenses aren't available in Australia.
Id be interested in the colour vision glasses.
In traffic lights in the UK the green light has been deliberately modified to have a lot of blue in it to help people with protanopia/deuteranopia discriminate it from red and yellow. If you have good colour vision at the blue end of the spectrum, the lights often look bluish from a distance, especially at night.
In Québec, Canada, red is square, yellow is diamond and green is circle. There is no mistaking shapes even if totally colour blind.
@@isabelleblanchet3694 how sensible!
Interesting!
I have mild red green deficiency usually if the colour object is big enough i can tell them apart, but if its really small (like a colour picker pallet) then it's hard to tell some shades apart
i'm deutoropic and i don't have issues seeing traffic lights. the problem is in video games, because they always choose that light green that i can't really tell off from yellow. grass green is apparently a foreign concept to literally every one who makes games with color puzzles.
Seems like the glasses help you see more colors but at the same time reduce the saturation of all colors
I have trouble with green and yellow, brown and green, purple and blue, etc. The green on the traffic lights here is kinda like a mint color, so it's easier for me to differentiate it from yellow.
Great video. Sounds like you're a Kiwi too!
Dude I saw your series on enchroma! I enjoyed every second of it, better than any video I could make. And yes I am a kiwi too! 😂
@@AntonioTheOptom haha cheers dude! You did a great job with this video. It’s insane how many optometrists I’ve seen on youtube that clearly know very little about color vision science, yet they endorse Enchroma’s bs claims. Seeing a Kiwi optometrist get it right made me proud 😎
I have an issue with blue/yellow which I never knew about until I was in a university psych class and they pulled out the dots.
As an optometrist, is it common to encounter people who fail an eye test because of dyslexia?
But as for your video, I suffer from both color blindness and deficiency. It's a rare genetic trait I inherited. I has a deficiency to certain colors, in the other to other colors. My right eye actually does have color blindness.
So things like the sky or green, and traffic lights are orange, highlight yellow, brown.
I thought that people in school were just being stupid or trying to play pranks on me
With regards to the traffic lights, what about blinking red or yellow lights? How is the color deficient person supposed to know if they should fully stop or just slow down?
I am pretty mild red deficient but i do get confused with colour coded graphs, and LED indicators of yellow vs green look the same, people saying there is a red thing, that a sunset is red, that a car /isn't/ purple, that i've painted the sky purple in school. Tip for LEDs was to put red nail polish over them, since i am a musician, using electronic devices and sometimes its important. I noticed windows 11 has a colour deficient mode which idk if useful, but i remembered i switched it on and went NAH THOSE TEST ARE WRONG until i remembered i had left it on and was completely blind to ishihara numbers when i turned it off. So it must do something useful. To me i was curious if it gave me any normal vision for viewing photos, which i really doubt, its more about practical distinguishing and hard to correct as there is a hue shift, saturation and things that are very specific to individuals.
Also read that since its on the X chromosone its rare in females, but not for them to be carriers and a theory exists about them gaining the extra shifted cone in addition to the 'correct' one, due to having two X chromososnes resulting in tetrachromacy of some sort. Unlikely real tetrachromacy, but potentially better colour definition.
That said, i did find sources that say red-deficients are better at green distinguishing and some ishara tests are out there that colour deficient can read but normal vision can't. I expect that's down to neuroplasticity...or something? But the military have explored the prospect of using them to find things in camoflage, not even kidding.
Hello!!
I just want to ask that my eye get red when ever i where my lenses so what should i do??
Hey it’s just my first time wearing a contact lenses and when I look up my contact lenses feel so uncomfortable is that normal? Thank you and new subbed btw!!
Yes because more or your contact is under the eyelid. Keep your eyes hydrated with an occasional eye drop made for contacts or by blinking more often
I have deficiency. I can see saturated colors, some light hues of pink, and blue look the same, as do light shades of green and yellow. I cannot see red lettering on black background. In bright sunlight red traffic lights look like they are turned off.
My Dad was colour blind, however I am not, I could easily see the numbers in every one the colour blind test plate thingies (I'm not even going to attempt to spell that). However, I have a pair of shorts that that Mum insists are blue, when they are clearly grey.
Where’s the other video?
I noticed I see a difference in color when others swear it's the same. I've attempted to find it in color swatches but they're too standard. It's mainly in the blue range but I've seen a few different reds. Usually adds clues when looking at paintings for example. But I'm highly sensitive to bright light and can see great in the dark.
Question, have you eve been exposed to mercury fumes (broken fluorescent bulbs or in chem class in school). They tell me that is why I have what you describe. Ive been exposed both ways. Dont know how much or at what age it causes most harm. Thot maybe it would help to know youre not alone.
@@frederickwise5238 actually yes, I used to break the long bulbs against trees. Owned mercury but wore hands ppe so fumes would occur I'd assume. Off to go research this. Thanks. Kinda better not being alone and terrified from mercury exposure hazard knowledge.
@@Zepplin76 I got mine from Chem class in H.S. No idea why the prof didnt warn us about exposure.
Another question (the answer may be difficult for you to learn.)
I can see up into the low ultraviolet portion of the light spectrum.
No one has any idea why. But < if you were to find that you can too >, maybe it is the result of the mercury exposure.???
We have what is known as a "Butterfly bush". Its blossoms radiate in the low ultraviolet to draw butterflys. They are pink, for me the ultraviolet portion shows to the left and down from the main bloom.
@@frederickwise5238you guys have the coolest visions, not gonna lie.
2 of my coworkers look at the castleton on the hudson bridge and swear its green .one says antique green. Its closer to sky blue with a slight tinge of green. Any ideas?
blue-green can be culture/language dependent. Some languages do not have blue and green in the base language and thus, culturally and thus practically, the differentiation between blue and green is less trained.
I’m red green color blind but it’s really deficient. I can see green lights during the day but not red lights or yellow lights or break lights or blinkers. But I still drive. Just have to pay attention to the car on front of me and don’t tailgate. I don’t like driving on unfamiliar areas. At night I can see all these lights.
I want to see the normal tree canopy colors in the summer so bad! I didn't know it was more than just green (and brown?). Also peanut butter isn't green. Also, why do I randomly see a green tint on everything? The green is more noticeable on my skin.
Hahaha OMG I totally forgot that peanut butter is not green. Being color blind, I just couldn’t care less about what color it is and naturally look at it as “peanut butter color”
7:10 the problem is more subtle: if you know you expect green, brown and blue and you have those colors, there are tricks to identify them.
Or the worker realizes the impossibility. Little worries.
The problem is: If a color impaired person misidentifies a color in a harness and writes it down. Now we have a problem:
A person with normal color vision can not identify the wire and thus refuses the work until clarification.
A person with different color impairment will identify the wrong wire.
I pretend to be red-green colorblind at work to mess with people buying cigarettes, now I know exactly what to say to make it seem more legit.
I have a yellow blindness. Which because of the way the eye works it is not a yellow blindness. The eye does not see yellow. Yellow is created by the brain by the combination of blue and green light. So what I have deduced is that I have a deficiency in combinations of blue and green light. But it varies by eye. I see one shade of yellow with my left eye. But because I had a caterac in my right eye and my lens was replaced I see a different shade of yellow. Take lines in a parking lot. I'll see canary yellow with my left eye and lemon yellow with my right. Although on printed paper, the color yellow will almost fade to white. When I do a color test on my color printer the yellow is almost nonexistent. Neon yellow highlighter is totally useless. I was first made aware when I worked for a judge with an eletronic courtroom. I had a document that had neon yellow highlighter on it. I saw nothing on the document until I put it on an electronic overhead camera. The image of the document showed the highlighter as clear as day. The problem was the neon highlighter. The regular yellow highlighter was easily visible.
what are the wages for an optometrist?
I would like to watch a video about colourblind glasses
You need color vision to be a pilot and cop?
There's a huge number of instruments in a cockpit that have specific colours for warnings. You don't want the plane falling out of the sky because your pilot didn't see a flashing red light for something. Although they have audible warnings too, I think it's a general warning alarm meant to cause the pilot to search for the relative light, which will take longer for someone who can't see the colour of it, and this isn't good in a time critical moment when flying a plane. Unfortunately, due to how expensive planes are, particularly the instruments, etc, the various control panels are kept going for decades, so if they changed the problem colours in new kit, it could be 50 plus years before it would make up a significant enough portion of aircraft a pilot could be flying to actually remove the safety issues for someone with a colour deficiency, if it could even be achieved with the shear number of controls, and on top of that, every single active pilot would need extensive retraining to get the 'old colours' out of their mind.
As for police, it might depend on region. Some countries have partially if not fully red emergency beacons, and I think everywhere will have rear red flashing lights, and I presume emergency kit inside the car will have similar lighting too for when certain lights are on, but without an audio warning like in aircraft. Also, they have to respond to a huge array of situations, from police chases (where they could be approaching traffic lights at speed so need distant recognition of them before knowing specifically which bulb is illuminated) to assisting evacuations of an area where there's a chemical spill (dyed a colour they might not be able to see), to dealing with suspects with conceal weapons or illegal substances (for which colour is an additional identification detail, so a knife could have a red handle, or a certain tablet could have a pink hue or they could have a green leafy substance across mats in their car that would be reason for arrest but not immediately identifiable to someone with a colour deficiency, and possibly not offer such an officer the same grounds for arrest as one with full colour vision. Put more simply, they're dealing with the extensive variety of the 'real world' where things don't change colour to make them more easily spotted to someone without the full range of colour vision. Criminals aren't going to dye their cannibis to make traces of it more visible to officers with a green colour deficiency to meet new workplace regulations. A big one I missed was describing what suspects are wearing when they flee from police. They could end up describing a distinctive red or green hoodie as grey or yellow and send their colleagues with full colour vision after the wrong person.
I have severe color deficiency. Oh, btw the picture of the plane is Itami airport in Osaka. I lived there for 10 years and every time I went jogging I’d cross the place this picture was taken. Oh. And I hate it when they ask me “so what color do you see here?” “Dude, you don’t ask a blind person how they see your new t-shirt. So shut the heck up!”
Wtf is wrong with everyone asking constantly about colour blind/deficient ppl a d traffic lights?! Doesn't really matter what colour they are as long as you can actually see them light up. THEY ARE IN DIFFERENT PLACES FFS!
3.34 see the difference now that i turned on the red deficient filter...................ummmm they look the same hahahahah as a color deficient man i was hoping to be shown what it looks like to everyone vs what it looks like for us. but then i realized he IS showing that but we cant se it. like the green 7 on the test. it simply isnt there
Is there an opposite effect where people see extremely saturated colours?
lsd?
5:46 i see absolutley no difference in color betwwen the pictures^^ only the right ones are more damp
Traffic lights should be blue, green and red.. because those colors are very different looking even to color blind people
Yellow and red look similar to color blind people
WoW… I‘m rare…😅👍 i only see the red light🥴
I'm lucky for a guy, I can see about 35-37 different colors on that scale. Couple yellows and purple look the same
the test does not properly work on a screen.
Maybe the recording is imperfect, likely your screen is messy (uneven lighting over the area, incomplete color recreation, in proper setting increasing contrast, optimizations for switching speed ...).
You would have to have it in front of you.
There are some pigments are amazing: When you see them you them clearly, but you can not take a proper photo of it, because the precise wavelengths (and sensitivity) of sensor and screens does not match your eyes.
@@sarowie that is true. The screen test isn't as accurate as the printed test at the doctor's office. In my case, I had just taken the test for some new glasses and I was speaking on that.
You are correct, taking a photo with a phone camera of a screen is not very accurate, but could serve as a baseline for some people
"Extremely rare"' "2%" "European populations" Oh, come on! The whole european population is about 750 million. 1% of that is *7 MILLION people*
If that number of people is considered "extremely rare" what about diseases which affect like 1000 people worldwide? What about those who affect 10?
1% when talking about populations is HUGE, there are whole countries whose population is 7 million.
I don't know what I have, but with the nail polish color for example if you put them next to each other I can see the difference... if you show me one at a time I'll tell you they are the same color. This has happened thousands of times in my life, I think two colors are the same until I can put them literally right next to each other and then I can see the difference.
8:32 well where is "here"???