I remember watching this video SO MANY TIMES for my high school biology tests because I couldn't get it. Now, I'm about to graduate university and start practicing as an optometrist. Thanks Hank 😬
@lin80085 Жыл бұрын
This is so cute! Congrats! PS If you want some easy to digest eyeball material, I highly suggest anything by Tim Root.
@aasthasharma38208 жыл бұрын
Hank: that you don't want to google Me: IMMEDIATELY googles it extremely disgusted goes back to video Hank: I'll just sit here and wait for you to google it
@mytaeneedssomesuga91307 жыл бұрын
aastha sharma same here
@sui50006 жыл бұрын
aastha sharma so what is it? I'm to afraid to search it 😰
@isiomam89456 жыл бұрын
same when he said that i went googled it but it gross
@bonnie522296 жыл бұрын
I googled this, and I expected worse.
@jacoblaughslel47656 жыл бұрын
SAME!
@mercedeztinney93117 жыл бұрын
hey guys you know what would make your videos even better?! if you could include the script in the video description, TO STUDY FROM! That would be amazing. LOOOOVE your videos
@user-be3hp7he9y5 жыл бұрын
This is late but if you open KZbin from a computer, you can open the script! Click the three dots below the video and then click "open transcript" :)
@Mai-tu2cb5 жыл бұрын
It would be nice, but i wouldn't demand tho 😂 I rewriting everything he says in my notes and its effective in reviewing👌
@jaymo1425 жыл бұрын
Came off a bit rude...
@danielreinaga17275 жыл бұрын
mercedez tinney ID love to study you
@letssacrificetobymarshall11455 жыл бұрын
Subtitles
@9Epicman7 жыл бұрын
Im using my eyes to learn about eyes
@fortimTT6 жыл бұрын
that's deep, man
@emilytheweirdo47525 жыл бұрын
And your ears to hear Hank talking
@cheesypizzajokes5 жыл бұрын
i can respect that
@MrSnuggelsworth5 жыл бұрын
Funny how the brain has defined itself as the most particularly superior to other forms of life..
@amirabawa5 жыл бұрын
😂😂
@llawliet23107 жыл бұрын
More info (not that anyone asked but here I go) - there are more cones packed in the centre of the retina known s as the fovea. Each cone has a small receptive field (on centre off surround); conversely there's more rods scattered throughout the periphery with larger receptive fields - due to the small receptive field, each cone can pick up information in their reference in great detail (high visual acuity) because each is focused on a small part of the visual field. Vice versa for Rods which is why they are better suited for movement and black and white imagery - our visual field is represented as an image on the back of our retina due to retinotopic organization; this information is not altered - cones attach to parvocellular retinal ganglion cells while rods attach to magnocellular retinal ganglion cells - the optic nerve leaves the retina and travels to the thalamus which is responsible for relaying all incoming sensory information aside from olfaction. Visual information is relayed through the Lateral Geniculate Nucleus of the thalamus to PVC (primary visual cortex) of the occipital lobe - magnocellular pathways in the LGN are relayed through layers 1&2 of the LGN while parvocellular pathways through 3,4,5&6 - when this information reaches the occipital lobe, magnocellular pathways are sent through the thick stripes of the striated cortex (through indirect and direct pathways) - parvocellular pathways are sent through interstripes and thin stripes (visual acuity) of the striated cortex of the occipital lobe - when we see an object we are familiar with, two general things are happening: the occipital lobe sends information through the dorsal and ventral streams to go to the parietal and temporal lobes respectively - once the dorsal pathway reaches the posterior parietal cortex (PPC) this is where spatial recognition happens (exactly where in the visual field the object of focus is) - when the ventral pathway reaches the Inferior temporal gurus (IT) it's responsible for object recognition- what exactly it is what we are looking at - there's more to this than just what I've wrote but it's an extremely interesting sense to study; also easier to study in contrast to cognition because vision is localized to select discrete areas of the brain
@alkaveenus78835 жыл бұрын
Thank you so much for these educative points.
@DuranmanX9 жыл бұрын
I didn't see the flag on the white screen, does that mean I'm unpatriotic?
@therealandrewlund9 жыл бұрын
***** technically, I guess it just means that our cones are in great physical shape and don't tire easily..
@grimreefer43669 жыл бұрын
***** You moved your eyes I'd guess. I'm a little bit drunk, and me eyes kept shifting around the image. I've seen it before though. You really have to stare at it, not just casually watch it.
@komali1009 жыл бұрын
***** No. I think what might have happened is your eyes were still getting light from other sources. Did you by chance watch this video in a well lit room? The effect of the illusion is at its greatest if you look at it fullscreen, with your computer's screen at the brightest level, in a dark room.
@AzureKite9 жыл бұрын
komali100 Not only the effect of the illusion is greatest but you'll also go blind a few years earlier if you do too much of that.
@DuranmanX9 жыл бұрын
komali100 well I've done all that, even without getting a bit of sleep, and I still couldn't see it could it be because I wear glasses?
@chrisquisha24298 жыл бұрын
I'm a nurse and even I started feeling woozy at those globe luxation pics omg... anyone who isn't in a medical profession, looked it up, and endured the images has my IMMEDIATE respect! Next time you're in emerg let your nurse know of your accomplishment and you'll have a new best friend
@cakevictim8 жыл бұрын
I work in surgery- didn't google, don't like getting into globes!
@conandenz84134 жыл бұрын
It's not that bad.
@IIIUTUBEIII6 жыл бұрын
I resisted the temptation I didn't google it.
@oldebricklighting17936 жыл бұрын
boobs
@Ava-ks4yn4 жыл бұрын
i started to but didnt click on images even though i *really really* wanted to
@subhashreepanda41894 жыл бұрын
I am honestly proud of u U just saved urself from a week filled with trauma
@Cheese-hi5ix4 жыл бұрын
Ava Grace do. Not. Click. Images.
@NeleDeGersem4 жыл бұрын
me too but i was NOT tempted
@BoxofCarrots4 жыл бұрын
I have a psychology exam in two days. Praise this video for making studying pages upon pages of textbook info entertaining and amusing.
@TriggerHappyRC19 жыл бұрын
Googled it, looked painful but nothing special. Got me curious about some of the common causes for it. Learned that globe luxation can be caused by Grave's Ophthalmopathy which is an autoimmune disease that attacks the fat cells around the eye which swell compressing veins and stopping the drainage of fluid from the eye. Thanks Hank! Got to learn something extra.
@Peanutker4 жыл бұрын
Hank:You really do not wanna goggle it Me:* Immediately goggles it and cry’s because of the images* Hank:I will just wait for you to goggle it Me:*still crying*
@christianjames62568 жыл бұрын
You literally came back to rods & cones in a minute after you mentioned it (5:13 to 6:13)
@aasthasharma38208 жыл бұрын
5 13 is my birthday
@miss0noodle7 жыл бұрын
aastha sharma almost your day!
@fiaa.65398 жыл бұрын
Hank: ... called Globe Luxation-- *immedately googles* *cries out in disgust and terror* *Plays video* Hank: That you really don't want to google!
@teagan_p_9995 жыл бұрын
And then the "I'll just wait here while you google it" because we all know we will.
@vmlynn8757 жыл бұрын
Without Crash Course, I would have failed at Anatomy. Thanks so much!! I did very well in the class!
@mjocosta82758 жыл бұрын
now i will hold my eyes every time i sneeze for my entire life XD
@chiedzamatowe43974 жыл бұрын
Your lectures are full of energy and easy to follow. Thank you CrashCourse team.
@futhark39 жыл бұрын
A couple of months ago I visited Aarhus in Denmark and visited their art museum ARoS. Therre's an installation on top of the museum called "My Rainbow Panorama" by Ólafur Elíasson, where you can look over the city from glass of different colors. Being in there is a perfect example of how your cones are desensitized when overstimulated - If you look at the view from the red part for a while, it looks totally normal, but looking at your phone all the white letters are bright turquoise. Cracks in the glass also show how the colors are off in the "real world" after getting used to the colored version. It is totally confusing and gave me a headache after a while, but so insteresting!
@Buddyb3099 жыл бұрын
I GOOGLED IT!!! OH GOD WHY?! WHY DID I GOOGLE IT?!!
@jeffct879 жыл бұрын
I can't keep recklessly googling terms I don't know when I already can't sleep
@Cami969 жыл бұрын
It's not that bad...
@Cami969 жыл бұрын
***** I think there's so much worse stuff on the internet... try googling trypophobia
@jeffct879 жыл бұрын
***** and you try googling blue waffle.
@Cami969 жыл бұрын
thanks for supporting my point, now excuse me while I puke
@zekeboy247 жыл бұрын
This was probably the most interesting of the first 18 A & P videos so far! Amazing stuff, our vision.
@IAmMrSoup4 жыл бұрын
Who is watching this for school
@mongolianpearlove8 жыл бұрын
Thank you so much for this simple and fun breakdown of vision. So helpful in studying anatomy and physiology!
@larinaboydrn24498 жыл бұрын
As an online AP student for nursing pre-reqs you sure made learning and getting to the point so easy! Yes.. I googled it. ugh. eww. lol Next quarter I'll be doing APII online and using you for reference. Thank you! :)
@Buttocks799 жыл бұрын
Vision scientist here. That was a great video, I imagine I'll use that in some of my teaching in future. I really recommend adding a fixation cross to that flag at the start though in order to make it more effective, the illusion can be basically extinguished if people are moving their eyes all over the place.
@GetCraftyCrafty9 жыл бұрын
My eyes!!!
@Emilieeeee18 жыл бұрын
Anyone noticed the pics are moving at 1:18?
@yawsikakawty58718 жыл бұрын
That was so obvious sure we did
@alexchen68758 жыл бұрын
yeah. It fits with what he is saying.
@swatisingh9508 жыл бұрын
Emiliee yeh
@thatonemajin35787 жыл бұрын
loominati
@harshilpatel45834 жыл бұрын
Yes i did
@PER20087 жыл бұрын
THANK YOU SO MUCH for these! I am currently taking an A&P course online and your videos really help tie everything together for me. Keep up the great work. I really appreciate it.
@chasebaldwin78018 жыл бұрын
you should do a Crash Course on Microbiology. This is a very good outline for A&P which has helped me alot in my course!
@crashcourse4 жыл бұрын
Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App! Download it here for Apple Devices: apple.co/3d4eyZo Download it here for Android Devices: bit.ly/2SrDulJ
@parkiratsingh49227 жыл бұрын
THAT GUY IS INSANE! thanks man such a great video.
@kayleighfredericks54955 жыл бұрын
Here before my biological psychology exam. Thanks Hank (or tHANKs!)
@syadrinaparamita4 жыл бұрын
Kayleigh Fredericks omg same
@jj-wz1im7 жыл бұрын
Great work... it's been two years since this was published and it is still helping people
@AngelValis9 жыл бұрын
I have Ocular Albinism (at least a minor form of it because I don't present all of the symptoms listed in the wiki page, but that's what my eye doctor called it *shrugs*), so my retina doesn't contain enough pigment to completely stop light from bouncing around when it enters my eyes. As a result, even with brand-new glasses, there's usually a slight blur to the edges of things.
@ernitahunter60845 жыл бұрын
I am a nursing student, when i watch the videos i have my biology book with me while watching. So far, everything in the videos are the same with my anatomy and physiology book. Thank You . .
@fatherofwar12039 жыл бұрын
1:17 Anybody else notice the background photos are moving?
@Richard_is_cool4 жыл бұрын
No
@maeen..4 жыл бұрын
Oop
@Gigi_Ouija Жыл бұрын
The 3D rendition of the eye receiving images was exactly what I needed to be able to conceptualize the different functions of the layers! Thanks :D
@dominiqueguzman1447 Жыл бұрын
I would just like to say I’ve learned more from crash course than I have from my A&P teacher all semester 🥹❤
@Tonydaling8 жыл бұрын
Now every time before I sneeze, I will become very afraid. BTW I googled it.
@d̈̇̃r̈̇̃7 жыл бұрын
UberGamingHD In allergic to Grass 😭 It's really hard . I feel ya.
@carni36656 жыл бұрын
I always try to keep my eyes open when I sneeze. Now I'm going to do otherwise.
@minaghoshdastidar19816 жыл бұрын
Me too 😏😏
@otogigulis72605 жыл бұрын
If everything is ok your eyelids will always close when sneezing so you wont damage your eyes.
@ILoveAlice19187 жыл бұрын
After two lectures and two books I finally understood stuff thanks to this video! Thank you!
@scotchbonnet76 жыл бұрын
This was incredibly interesting and helped clear up a couple of areas left vague in my uni course about the structures of the eye. Thanks for the video :D
@aubreybanguis36166 жыл бұрын
I always watch crash course before starting a new chapter to give me a general overview :) Thanks crash course!
@sharonarruda25186 жыл бұрын
These videos are helping me so much with my biology course! I wish I discovered them months ago.
@Red-ci3te8 жыл бұрын
Man I have an anatomy and physiology midterm and your videos have helped SO much.
@naomigodwin8659 жыл бұрын
Hi, I'm training to be a nurse and I use Crash Course possibly more than I should admit to my lecturers, I was wondering if you could please do one on enzymes and catalyst reactions? also, thanks for saving my ass on my last assignment, I got a distinction thanks to Crash Course!
@mz009565 жыл бұрын
Could you get somehow into the System where the information gets from the eye to the brain and add some signals? Like attach a small cable that can send signals in? If you could decode how your individual eye converts the light into signals, you could then add something to the image that your brain gets. Like Information from a camera for blind people or just a small windows 10 tab where you can see that you are to late for your flight to Europe.
@jenryann81839 жыл бұрын
When Hank said: "We are going to mess with you brain." , I remembered Jason Silva and Brain Games lol hahahaha.
@daffenieru28675 жыл бұрын
thank you so much !! you spend a great 10 mins explaining eye function and structure in which my lecturers spend 2 hour on these .....
@91mezz9 жыл бұрын
Dear Hank and Crash Course, Thank you, THANK YOU, THANK YOU, THANK YOU, THANK YOU! Did I mention thank you? Seriously, your videos on anatomy and physiology have made my bio med subject way more interesting and understandable.
@palakmehta3656 жыл бұрын
This channel came like a blessing in my life
@GamebossUKB8 жыл бұрын
I fuckin googled it. You want to huh. WELL FKN DONT
@davidndiulor84288 жыл бұрын
Why
@GamebossUKB8 жыл бұрын
David Ndiulor you googled it. i can sense you did
@xitlallimarysolgarcia18228 жыл бұрын
+Gameboss UKB OH MY FUCKING GOOD I GOOGLED IT I'M CRYING THE IMAGE HAS BEEN SEARED INTO MY BRAIN
@xitlallimarysolgarcia18228 жыл бұрын
+Xitlalli Marysol Garcia GOD NOT GOOD
@GamebossUKB8 жыл бұрын
Xitlalli Marysol Garcia lol internet logic (tells someone not to do it (does it anyway))
@madisonkrawczyk72257 жыл бұрын
I absolutely HATED doing the visual pathway in class, this just made it so much easier to understand I friggen love hank
@gabbyavery4209 жыл бұрын
Wish I knew this information before my AP Bio exam (aka frq1)... Oh well
@ahcokris8 жыл бұрын
I don't want my eyes to get tired, so I don't look at the screen all through each episode. I like this cousre since i'm a "nurse" =)
@39ocean7 жыл бұрын
This is great, but I wished you had talked about lens shape in relation to focusing and vision. That's something I find tricky.
@divyanshrajverma78907 жыл бұрын
you all are doing a great job, keep it up all the students appreciate what you are doing for them thanks again.
@farahm14694 жыл бұрын
Haha never googled something faster. You got me Hank. That is fascinating stuff
@v.dargain16784 жыл бұрын
Love it bro . What you see is definitely what you get . So don't take it for granted . Got it !
@OrionFyre9 жыл бұрын
"Which you REALLY do not want to google." I start moving the mouse to hit the pause button "...I'll just sit here while you google it." 'Thanks Hank. be right back'
@geniusmp20019 жыл бұрын
Something was bugging me about the graphic showing the cells in the retina. It took me awhile to realize what it was, but I figured it out. The photoreceptors are behind the neurons. And as soon as I realized that that was bugging me, I remembered that it's not wrong. That's actually where the cells are in the retina. Light has to go through the neurons and blood vessels to get to the photoreceptors. And the neurons have to punch a hole through the retina to get the optic nerve back to your brain, giving you a blind spot. It bothered me not because you got it wrong, but because that's a stupid way to build an eye. Cephalopods do it the other way around, because their eyes developed from the skin inward, instead of from the brain outward like vertebrates. Evolutionary baggage is everywhere.
@S23K9 жыл бұрын
Matthew Prorok I had the same thoughts, in fact I'm not even done with the video, I had to check the comments to make sure it wasn't a mistake.:P
@XxSeedOfEvilxX9 жыл бұрын
Matthew Prorok If only the eye was intelligently designed...
@cuckoophendula82119 жыл бұрын
Matthew Prorok I remember having that same thought when studying for a med school exam many years ago.
@IMadeOfClay9 жыл бұрын
Cuckoo Phendula I remember thinking that was a stupid design too but I came across this a few months ago: m.bbc.co.uk/news/science-environment-31775458
@ConradJD7778 жыл бұрын
+Matthew Prorok Ha look, all the people ready to hate on creationists when they don't realize that if blood vessels weren't in front of our eyes the radiation from the sun would burn through our rods and cones and we would be blind in a week.
@RianKashfi8 жыл бұрын
I'm unable to see the flag on the white background, obviously because I'm Canadian. lel
@zhnkbr5 жыл бұрын
how is "Faiyaz" spelt with so much enunciation but "Rian" so bland (frm bd tooo}
@gaylecheung30875 жыл бұрын
Faiyaz Kashfi Rian it’s to close to your eye, that’s why...
@jediknight5335 жыл бұрын
It is comforting to know that when our eyes attempt to pop out of our heads that they look like squish/dog toys. The more you know!
@4_Science9 жыл бұрын
Wait does light have a varying amplitude? My understanding is that brightness is controlled by the NUMBER of photons, not a variance in the amplitude of those photons.
@TwoStepILY10 ай бұрын
Today is my anp final, going in with an 85% just wanted to say thanks hank and here’s hoping I pass!!
@Bram069 жыл бұрын
Hank: ill just sit here while you google it... me: *sight* what am I doing with my life? edit: alright I just googled it and HE REALLY WASNT LYING. DO *NOT* GOOGLE IT
@kitsunekyubino93459 жыл бұрын
Bram06 I COULDN'T STOP LAUGHING!!!! I don't know why. Maybe I'm just desensitized to everything the internet can throw at me?
@nathandevotta44534 жыл бұрын
its better than ASMR
@digiexploration5304 жыл бұрын
@@kitsunekyubino9345 that's weird. the pics are horrenouds. you are not supposed to laugh...
@vulpinedeity33794 жыл бұрын
Made me laugh.
@thundermontero4 жыл бұрын
I LOVE listening to this guy. I laugh pretty much very single time.
@lordspoice51929 жыл бұрын
Personally I saw Gold and White in the after effects.
@blackmesa2323239 жыл бұрын
It's black and blue!!!!!
@benchapman48819 жыл бұрын
Lord Spoice Not This Again It Has Been Proved To Be Black And Blue So Everyone Shut Up. There Have Been Other Pictures Of It And They Where Black And Blue.
@lordspoice51929 жыл бұрын
Ben Chapman its a joke
@VCheesey9 жыл бұрын
Ben Chapman Okay Jayden Smith
@benchapman48819 жыл бұрын
Lol Sorry Just Re Read And Saw How Agrresive It Was. My Apolgies. I Also Thought You Were Talking About The Dress Which Is Getting Old. My Sincere Apolgies
@1DogoArgCali8 жыл бұрын
Thans Hank! For the neural layer I did not see the horizontal or amacrine cells though?
@ionicwoodsman28558 жыл бұрын
When It turned to the blank screen, I just noticed all the floaters in my eyes :(
@SashKaLakers8 жыл бұрын
Same here! :((
@chocolatez90427 жыл бұрын
All I saw was a blueish rectangle
@poolplexer6 жыл бұрын
same
@iwuvmuffinz6 жыл бұрын
You might have aphantasia like me
@alinameanslight28972 жыл бұрын
BOOM!! That was amazing!! I've been trying to learn all of this through various sources, and this video single handedly brought it all together and made it click... Thank you so much!
@Mattteus9 жыл бұрын
"You've got sphincters everywhere" it's funny because it's true
@KevinHosley9 жыл бұрын
3:55 I've done more than just scratch my cornea. I once had my cornea completely taken out. It took weeks for me to not be light sensitive in that eye. Luckily, I didn't lose my vision. I don't wish my injury upon anyone.
@blkpik49938 жыл бұрын
Is there something wrong with me, I don't see the ghost effect of the flag. I just see the white screen
@MrJ37 жыл бұрын
You should focus on a point in the middle of the image. It doesn't work if you let your eyes flicker around the screen, it gives your receptors time to adapt and rest.
@sergiosanchezpadilla14187 жыл бұрын
The same happened to me. I do see the ghost but for like .01 seconds. I would say some of us have more resilient cones :P But I don't know, maybe we need more "controlled" conditions :)
@lobe487 жыл бұрын
it helps if you blink quickly while looking at the white screen
@Emanuel-sl7cd7 жыл бұрын
It helps if you stand upside down
@centrifuged03557 жыл бұрын
Even I couldn't see any color... 😮
@valeriewalsh49007 жыл бұрын
I literally watch crash course for fun. I love these videos more than anythingggggg
@jacoblee60794 жыл бұрын
Hank: Tells us to not look up Globe Luxation Me: *Stress levels increasing*
@Durakken9 жыл бұрын
Question... If you pop your eyes out randomly should you try to put them back in or call a doctor first? It seems like a bad idea to let your eye just hang there, but trying to get it back in also seems like it might cause damage... So which should you do?
@MsDreamGirl0988 жыл бұрын
thank you so much for this informative video. I took a few screenshots of the video for my presentation, but I credited you if that's okay. Keep up the good work, you literally saved me in bio :)
@chloesimonds65107 жыл бұрын
Globe Luxation is going to give me nightmares for the next 5 months
@vividvenom72998 жыл бұрын
Love how he knows us all so well he knew we were all going to google Globe Luxation.
@nathandevotta44534 жыл бұрын
SCARRED FOR LIFE
@hehebwoy41325 жыл бұрын
You really help me in my science class.
@TaiChiKnees9 жыл бұрын
Oh yay! My favorite body part! Great episode!!! Also, I have to add that when I was in training, I had a very nice patient who had very shallow orbits and I was examining his retina with a special lens that sat right on his cornea. When I was finished looking and moved to pull off the special examining lens, it had generated a little suction and pulled his globe forward and his lids drew back past his eye's equator... and wow. I knew it might happen, and knew how to fix it, and had pulled many eyes forward in surgical procedures, and completely understood there was no way possible that it would fall out like in a horror movie... but it still startled the hell out of me. It evidently happened occasionally to this patient due to his shallow orbits and he just laughed at my reaction. :-)
@abood2010ize7 жыл бұрын
my teacher spent 3 weeks explaining this and you managed to make me understand in 9 minutes, how are you so good at this?
@dm_nimbus9 жыл бұрын
Fun fact: even talking about globe luxation was almost enough to make me faint. As curious as I may be, I don't think I could make myself google it.
@alexsitaras65089 жыл бұрын
James Craver cover your eyes when you sneeze
@merlokiii6 жыл бұрын
Changed the speed to 1/2. Thanks, I like the explanations and the illustrations!
@federicobau86518 жыл бұрын
haaa you killed me when you said : I will just seat here while you google it. hahahaa
@kiky.mp47 жыл бұрын
the animation for the eyeball popping out omg
@aaronprince86524 жыл бұрын
Hank: "Don't Google Globe Luxation" Me: Immediately googles it, Freaks out, Goes back to Video.
@eip31845 жыл бұрын
Just awesome in 9.39 mins
@AhmadChuzgapa5 жыл бұрын
use me as the 'shouldntve googled it' button
@ShadowedCross9 жыл бұрын
Don't google globe luxation.
@rooryan9 жыл бұрын
ShadowedCross Don't google globe luxation. Do google globe luxation. I googled it and was disturbed.
@kitsunekyubino93459 жыл бұрын
Jetlag Moto I COULDN'T STOP LAUGHING!!!! What's wrong with me...?
@kitsunekyubino93459 жыл бұрын
Jetlag Moto I COULDN'T STOP LAUGHING!!!! What's wrong with me...?
@ZEbelgiumfreak9 жыл бұрын
ShadowedCross Don't google tryphophobia!!!
@leelad.4089 жыл бұрын
Why ... Did... I look that up. *facepalm* +stephanDRX
@kcufdurttnuc53848 жыл бұрын
I did not see the flag
@VanillaCupcake68 жыл бұрын
I didn't either!
@pratyushpherwani7138 жыл бұрын
same here
@mujjuman5 жыл бұрын
Also make ur screen super bright
@sozyarjemil27426 жыл бұрын
I love you ,you help me sooo much and although sometimes it's hard to understand and you make me happy and make me to try more to be a doctor
@101falcon4 жыл бұрын
Nope I ain't googling it my imagination is cursing me enough as it is with an image
@BasketMelo7 жыл бұрын
Very nice crash course! What about the tendency of vision adjusting to staring at the same movement, like scrolling text or playing guitar hero. Is that also the photoreceptors and the optic nerves "getting tired" and keep firering after the movement is actually gone?
@Tahamul4 жыл бұрын
No one: Crash course: Farts smell like poop particles.
@dulcimerrafi9 жыл бұрын
I once partook in a lab exercise in college where I was asked to sit still and keep my focus forward. Another student would slowly pass a piece of colored paper into my field of vision and I had to say when I perceived the presence of the paper and when I could definitively say what color the paper was. There was a fleeting moment when I could see the paper out of the corner of my eye, but I couldn't for the life of me tell what color it was. It was a freaky experience.
@TheCheese97 жыл бұрын
googled globe luxation, was not dissapointed
@darrianweathington19239 жыл бұрын
so about 2 months ago i was in a store parking lot, looking into the visor mirror and the sun hit my eye at the perfect angle, and I COULD SEE EVERY DETAIL in my iris and it was like looking at a crumbled piece of brown paper...also that's the first time ive seen my eye color.
@rhyannahcielos7315 жыл бұрын
CrashCourse: Some produce ghost effects... Oh, like how he ghosted me lol
@colemanliam19 жыл бұрын
best timing ever i had biology homework to learn about the eye and then this video came out
@defiantlypinki11078 жыл бұрын
All I saw was blank screen. What's wrong with me?
@samkelly60648 жыл бұрын
You didn't stare at it for long enough. You have to stare at it for 20-30 seconds without blinking.
@candicenuyttens32668 жыл бұрын
same
@chelychan48637 жыл бұрын
Yea tht was same for me but after actually staring at one spot for the 30 seconds you'll def see it. I stared on it for a minute and even whole typibg this i'm seeing the dull red lines
@anjiwhatever56446 жыл бұрын
MissSweatpants Nothing is wrong with you ...some people are less susceptible to optical illusions..I didn't see it either!