Why The Human Eye Is A Design Disaster - Cheddar Explains
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- เผยแพร่เมื่อ 26 มิ.ย. 2024
- Over 24 million adults in the United States have eye issues: Either you’re born with eye issues, you grow up to have eye issues, or you get so old that your eyes deteriorate into one big issue. So why are our eyes an engineering nightmare? Well to answer that, we need to look into the eyes of a squid.
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Cheddar, lets just get to the point.
The entire human is a design disaster.
Bummer to the designer. lol
I need a repair manual
@@holdenleeb2312 The Cult Mechanicus can help...
Ah yes, just thinking the same
The entirety of every living thing is just a series of jury-rigged half-solutions that keep a creature running long enough to reproduce. Hopefully.
Torn between "life is miraculous, how amazing that we can see at all" and "if there is a God he needs to take a few more design classes".
"if there is a God he needs to take a few more design classes" but onece he made a good job.
@Deifan which one
@Deifan father
@Deifan there's a lot of gods over the ages most are already forgotten
Oh there is this one thing that we don’t understand about this design, well must be a bad designer, how arrogant.
I’m a medical student in my 6th and last year of medicine, and I’m hoping to get into ophthalmology next year, and I can tell you that the eye is one of the most complex organs in our body, and one of the hardest to understand the structure of, or the function of, let alone to speculate about the purpose of its design, and then you have someone who comes along with a simplistic mindset to call it a design disaster..
Such arrogance comes from a horrific lack of understanding and lack of knowledge.
The retina she talks about being backwards is 10 layers! And we barely understand the function of 3 of them, but sure let’s just jump to conclusions and say it’s just poor design, rather than poor understanding.
You would never find an ophthalmology scholar saying such things with that confidence, because they understand how limited our knowledge and understanding is of this masterpiece that is our eye.
“Near-sightedness is caused by too big of eyes”
Anime girls: 👁👄👁
Its no wonder nearly everybody could sneak up on them and they dont notice lol.
Is probably why some antagonist gave em heroes time to talk to each other in the middle of battle, cause they actually needed some time to find where the heroes are.
TBF she did say about 70 percent if East Asians have near sightedness...
Naani??
👁 👁
👄
No fucking wonder why Amy Rose can't make out the difference between Sonic and Shadow
I just talked with the CEO of Evolution. He said that it will be patched in about...34,000 years
lmao
Smh the update should have already come with the patch. Lazy developers making us live in an incomplete version.
I mean that's assuming they don't delay it, and plus that's extremely fast for them so it definitely will.
they better not delay it again i heard the patch was supposed to come out last year
Only if you pay for the DLC, the public version will be in about 100,000 years.
So basically toddlers should be outside most of the time to avoid eye issues later in life
Kindergartens, any comment on that?
As a certified kindergartener I 100 percent agree
Is it too late to go back to kindergarten?
There has been a study. In japan I think. They let children outside to play for an hr each day. After a certain amount of time their eyesight improved. Those needing reading glass's no longer needed them.
We were always a few hours outside each day in kindergarten.
if you watch screens all the time later in your life, I dont think it will count tbh
Cephalopods had their eyes set to "w" for Wumbo.
"I wonder if a fall from this height will be enough to kill me."
Or Woomy.
Or for "Wow, my eyes are the coolest" xd
@@austinreed7343 “Woomy” makes more sense. And “M” is for “Mammal.” But “Wumbo” is a nice reference.
wacky
I’m an optometrist, and we did touch on retina “design” in school. One advantage to having a backwards retina is it puts the rods and cones right next to the Retinal Pigment Epithelium (RPE). The RPE absorbs excess light so we get less glare and have better vision in bright light conditions. As opposed to animals like cats and deer that don’t have an RPE…they have a tapetum lucidum that reflects excess light (giving them the “glowing eyes” in headlights and better night vision). But they have to have very small pupils during the day or the glare would blind them. We didn’t discuss cephalopods much, but I think they’d have forward rods and cones because they’re typically deep water animals and light levels would be insanely low so they’d need as much help as they can get.
Exactly.
Whether one believes in creation or evolution we should stop calling organs that we don’t know about badly designed. They most likely are better than what we think is the better alternative.
@@ahmedyassir5569 dude it’s so cringey. These mfers would design humans with eyes that absorb too much light and testicles up our asses. I had to actually explain to someone why sperm can’t be created unless the testicles are on the outside of the body
but why does the pigment have to be in the RPE? and about the excess light, evolution can easily bring colored cornea or lens to the table so that it excess light. smaller eyes are also a thing. reduced pigment sensitivity will handle excess light just fine, or even pigment filler. anything I said is better than the backward retina
@@ahmedyassir5569 Yep pretty sure the “flaws” are just not understood properly
@@NomadAlly OK but there are actual flaws though. Wisdom teeth are a great example. When our jaws used to be longer like the rest of our ape cousins, they were very useful. Now they just cause problems and they literally don't even grow in straight
7:37 biblically accurate angels
"be not afraid this is completely normal"
@@rubenaalexander5007 I think we all could take a good guess at the type of metaphor Feud would have thought it was, too.
evangelion
Haha
Lol true
The conclusion of all of the design disaster videos; we must return to monke
THat wouldn't help much.. our retinas would still be backwards, for instance.
@@RichardRenes yes, but Monke 😎😎😎
We must return to fish
@@roifilham29 so we commit execute cannabilism
God was a terrible engineer or he is just enjoying thé pain and suffering of his creation
Eye see what you did there, Cheddar.
Eye see what you did there, Rahul
Lol 😂
I see.. Cheddar's going an eye for an eye with that joke
@Alex Ding
I must cataract your opinion. Eye like what's going on here.
Certified dad classic
Hi! Optometry Student here! The retinal photo receptors are oriented backwards due to the photopigment disc's that allow for detection of light need to be removed after they are used up. They "bud off" and are phagocytized by the Retinal Pigment Epithelium. This cannot be accomplished if the retina photo receptors were forward facing.
Yes, that explains how this whole system works. But why didn't our eyes evolve like like the octopus? I'm sure their photo pigment disks are also phagocytized, maybe placed somewhere else, but they still have their retinas facing forward.
@@someguynamedelan Because they didn't. I don't have detailed Physiology knowledge of octopus photoreceptor metabolism but they must have a different system.
"Our eyes are getting harder and more inflexable and there's pretty much nothing we can do about it." Well thats until we get cyberpunk eyes of course
*Cyberpunk 2077 starts playi...
Oh, wait, it crashed
sorry, but i'd rather my eyes not stop working in the middle of using them.
I would love to have cyberpunk eyes
@@archs1ay3r3 I'd rather have bio-engineered eyes. AKA create lab grown eyes with all the issues fixed. Digital cameras are a long way from being a viable replacement except in extreme cases.
@@TheAkashicTraveller hm. Wow I never even knew there were bio-engineered eyes. Learn something new everyday.
"close enough" is what god said
good enough for government work lol
God too lazy to fix humen smh
"It just works."
He probably was like "they are smart enough to solve it themselves"
@@edwartoelrico333 God: "where is Part E7?......Fuck I build it backwards..... lets just make them smart enought to invent glasses just in case"
since there's way less light in the bottom of the ocean, it makes sense to have more sensible eyes. But imagine having cephalopod eyes in the bright noon of a savanna?
Perhaps, but all vertebrates have backwards retinas and not all vertebrates live in high light environments - some are even nocturnal.
@@Obscurai True, but we would had to trace back the evolutionary lines to understand where this reverse retina started to appear and why non-reverse retinas weren't the norm (it may or may not be random).
@@djoxer Evolution works with whatever genetics is currently available, and since reverse retinas were what was available and other factors became more dominant for survivability, reverse retinas were then less important and thus persisted. Specifically, morphology does not persist in genetic isolation from other genetic adaptations that may bestow greater advantages.
The corollary is that poor adaptations persist into the future as in this case. The human body (and all lifeforms) is littered with genetically bad design from previous adaptations.
Subsequent adaptations are certainly less random since they are acted upon by the environment, but the initial conditions are very random as simpler lifeforms attempt all variations.
That's what you have e pupil for
You got it correct. If sensors/rod/cones are not inverted in human eyes, it would have been very difficult to sleep into well lit places. If not placed backward, u will feel someone has placed two lit torch on both eyes.
Human body is science and keeping it tuned/healthy requires above ordinary knowledge, wisdom and intuition. If u will do little bit research on Indian 100years before, it is clearly evident that there is no such thing like age related brain or eye deterioration. Gradual loss of wisdom and knowledge in modern life style is the only disaster.
The "backwards retina" could be developed to improve night vision. In cats, dogs and other animals that tend to be nocturnal the eyes have a reflective coating below the retina to increase the amount of light absorbed by the photoreceptors by having the light go through them twice and humans probably have that too (red eyes in photos). In this case you must have the retina backwards because otherwise the image produced by one of the light passes will be blurred and thus not that useful. Maybe this gave enough advantage to the organism to prevent it from flipping the retina "the right way".
Squids compensate by having really huge eyes. This is OK if you live in water but not that great if you live on land. Dust and debris in eyes quickly teached the evolving animals to hide the eyes in their heads, only showing the part that needs to be outside.
Wow
Octopus and cuttlefish don’t have huge eyes though.
“Evolution has been conspiring against you”
At this point what hasn’t?
Humans: 1080p resolution
Cephalopods: 8k resolution
Me without glasses: 144p
Me with my eyes closed: 0p
Me without glasses: HD resolution.
Me with glasses: Full HD resolution with enhance colors.
@@diamond_dogs It's one or are your eyes completely dark when you close them and turn the lights on
My eye resolution: 4K 60 FPS
Cephalopods: 24K with 240 FPS
I love this series, all of our body is disaster in design, I don't know I started to think maybe I starting become a slightly masochist 😂
at this point best option is to scrap the design and start from scratch.
@@water3410 Have you met another human? We are all kinds of screwy.
A masochist?
@@nobleactual7616 someone who enjoys pain, Including in the offbrand way.
"She did it for that soldier who was into whips and chains."
@@kirknay Yeah I know what it means but reread the original post in that context lol
My cousin and her husband both have a PhD in experimental psychology, and he happens to specialize in vision. He once told me that a professor of his said that the eye is "a $5 camera" that "fixes everything up in post."
“Your eyes are all blind and shit”
TommyInnit
If naruto has taught me anything if you are going blind get a “fresh” pair of eyes from your siblings.
It also taught us that if you lose an eye, you can always take the eye of your dying friend who got half his body crushed by a boulder
Why are these 3 comments familiar
I've watched naruto on tv yeah but i forgot
😂😂
You can also store some extra eyes on your arm
That was so dark it should be an Uchiha
Not Long eyes!! 😂😂😂 OMG. Don’t let the kids at school hear this. I’m fine being called 4-eyes...but not LONG EYES. 😂
Name noted.
Too late I have learned it
Well they are more oval shaped than round if you have miopia, yes they are a bit longer than normal, we're talking about nm difference
NOTED
Why the long eyes?
I like how every body part is a disaster yet when they come all together they function perfectly.
more like "good enough... for a while"
I don't know what do you mean by "perfect", but the body do not function perfectly at all. One needs not to think a lot to realize that.
"Eh, good enough...what's for lunch?" ~ Evolution.
Maybe the devs will patch these graphics bugs in the next update
Nah, I think they'd rather wipe and make a clean slate
I think it will take a while though. From what I heard, right now their priority is to fix the bug mess that is the Space Expansion. 50 years and rockets are still hitting a fucking invisible wall and exploding. Fucking lazy developers
These devs are lazy as fuck. The last year DLC was the worst, there's too many glitches and it's extremely pay to win. I'm considering quit this game for good.
@@rodrigofreitas3288 in addition to all that shit the DLC had a virus in it
Next, I expect to see a video titled "Why The Entire Human Body Is A Design Failure".
Okay coming up next
Better title “Humans are utter failures...of design!”
Well our bodies are pretty shit 💩 compared to other animals
@@TheGingerburger that’s why we have tools to do things our body can not
@@cheddar pog
Well... that backwards orientation reminds me of the deep trench isolation used on Sony sensors to avoid light superposition and to get sharper images 😺 getting better color accuracy
True. We got lucky with better coloured vision/sharper too, than most of the other mammals!! No offence to colour blind folks!!
7:37 THAT IS SOOO DISTURBING EUGH THAT SCARED ME OH HOLY HELP
The human eye is a design disaster. Now there's a challenge for a crazed genetic modification scientist...
It would be cool
maybe in the far future I don't doubt it
what ever nature give it ask for physical sacrifice but technology ask mental sacrifice
@@thatboii3094 if we have the opportunity to "fix" those pysicals mistakes then it would be of an great help for everyone, I don't know what you mean by "mental sacrifce".
@@hecofemonetization6270 i mean we need to be content with what nature gives because technology is dangerous (not safe) and some knowledge are ment to be hidden. and it isnt the scientist who are going to pay for,it is the people.
I, for one, welcome our cephalopod overlords
Please tell me you have read Children of Ruin. If not, please do. :D
They don't joke about sentient cephalopods. They are truly awesome.
Cthulhu approved this message.
@Shasvin Puvanesvaran
The sequel to Children of Time.
are squid kids welcome?
Gravity falls
This has been super cool! Could you possibly explain why I have to put extra effort into not going cross-eyes when I look at something up-close?
There's so many inaccuracies in this in regards to human eyes it hurts...
This is just the first episode in a whole series. Next: feet are kind of stupid/ spines make no sense/why are teeth?
They do already have a series about this, it has feet and teeth and spines and why they are badly designed
@@harleyrexun5310 just the latest episode in a series then :) all the same.
Last episode will be brain kinda useless
next episode will be "man, the human body is seriously fucked up, why are we built like this?"
So basically, "Mother Nature did us a dirty" is what we say to the Cephalopods
No it didn’t
Cephalopods abide in deeper sea where light is scarce so they have more light sensitive eyes to accommodate
If your ass had cephalopod eyes, you would be blinded by day light
This is legitimately making me realise how terribly built I really am, I can happily say “ i am not a failure, I am just a design disaster!”
I randomly found this video and I already love the channel.
So when are we going to see Chedder's New and Improved Human?
7:40, Thanks for providing my daily dose of Nightmare
Thank's I hate it
That is beautiful
That's what Angels looked like in the bible
Imagine telling an alien species that your retinas are backwards and they say, “Don’t worry fam... we got you!” And proceed to flip your retinas
😱
I mean, the human body wasn’t designed to live past your 30s and much less your 40s, só it just kinda gives up and starts to shut down after some time
doubt it
@@tylercooper4405 The Human lifespan used to be 30 years to 35 until through medicine and time our life spans increased a lot.
When u told me my pupil is an empty hole I wanted to pass out
Learnt that thanks to a magic school bus book when I was little, they straight up went into this dudes eyes
Don't worry I'll catch you ❤
@@Network126 simp
@@Network126 man wtf
@@minzuhagenda ?
Sometimes I wonder how a “perfect human” would look
Perfect human would need to abandon the flesh and become a machine.
Reject humanity become pc
@@agreenplasticwateringcan I reject my humanity JoJo!!!
@NoneOfThe Above Until it becomes aware of the absurdity of living and takes it's own life
@@lifeofi174 that would be a flaw though, making even the perfect organism flawed.
just random speculation but could the backwards retina simply be due to octopuses living in the ocean and humans living on land? In the ocean, the light wouldn't be as strong so more sensitive eyes would be useful whereas land animals are under direct sunlight. As humans we get blinded a lot anyways so if we gave light an even clearer pathway to our receptors wouldn't we just be blinded all the time? I mean I'm sure it's already been thought of but I'm just sticking it out there
"Lets take a look at a squid" proceeds to show a octopus, lol
As an ophthalmic technician, I can honestly say I LOVED this video. This simplified a lot of questions we get in clinic and in a way that everyone can understand. Definitely recommending this video EVERY chance I get ❤️
This video is completely full of lies..
I swear I'm heart broken because of the title. Cause I was just looking at the stars and moon yesterday thinking, "wow my eye can see these perfectly but my phone cant even see a tree in the dark."
One day, I might suffer from diabetic retinopathy. I wear glasses but my eyesight is good enough to get by on for the moment.
Great video and I'm very glad to know the science behind how eyes are able to give animals vision 👍❤️
Wow. This video was eye opening
7:37 this made me uneasy lol
They are watching you.
Biblical angels be like : BƏ ŅØŤ ÀFŘĄĪĎ
I felt like my vision started to get blurry while watching this video...
Me too
Ironically, many people prefer people with glasses over people without glasses which contributes to our eye sight not being the greatest.
Correct me if I’m wrong tho.
After the episode about why our feet are so bad, I am now convinced ALi Larknir wants us to become cyborg.
Am I the only one that has a low key crush on Ali Larkin?
You aren't alone, I was looking for this comment. I knew I wasn't alone😄😅😆😳😳😳
High key, actually.
@@cormano64 she look good even without make up
Anyone have any suggestions for other human body parts that are poorly designed? We will get to them all eventually...
The brain, maybe?
Have you done ears or ✋ hands?
Dude, stop complaining about blurry eyesight, you can just have like....glasses
and I agree with the other person in the comments, we need to stop complaining and start fixing!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
*no i dont hate you, its just that i dont think bodies are design disasters, bodies arent even designed anyways*
Have you covered the human foot, the human spine, or the human pelvis?
@@hajivideos9104 Well, that's kind of the point of these videos: _If_ bodies were designed, there's no way they could suck as hard as they do. Because no one in position of designing life forms could possibly be _that_ incompetent.
I knew about the blind spot (sort of) from a book when I was a kid that said if you close one eye then slowly start to look away from a person who's at a distance, at some point it'll appear as though their head has disappeared
"20/20 vision isnt necessary to survive or have a happy life." Unless you live in a rural area that doesn't have adequate or accessbile care. Your sight and ability to do day to day work is crucial for your survival and the community around you. Not all cultures have this privilege.
very reassuring to know that i have long eyes.
We really need to get a better game dev.
Maybe we can use selective breeding on Humans
Halvard Bødalen
I’m sure gene editing will be used instead.
let's hope this gets patched in the next update :(
I like your videos! I think they make a lot of sense and very enlightening! Pls can you make a video about glaucoma! Thank for all your efforts!
I think the optical receptors are very sensitive to light. Even with inverted receptors, we can still see. It might have been an evolutionary necessity since otherwise light might be blinding.
To test, beam light on your eyes with a flashlight or try looking directly at the sun.
lol
next up from cheddar: "Why The Human Is A Design Disaster"
make it hapn capn
Because of Tik Tok. The End! I saved u 13 minutes of your life. Thank me later.
7:37 That's scary.
no it's not you've been conditioned to be scared of it ~ヾ(￣⌂￣‶)ﾉyawn
@@3mar00ss6 Thank you for your social diagnosis, Edgy TH-cam Psychologist.
@@cormano64 no problem, any day, any time ( ¯◡¯)b
Angels: Be not afraid
0:28 that monkey is a whole mood. 🤣
Very eye opening video.
Ive heard eyes were developed for the ocean. Once evolution went to land, eyes have been kinda devolving since.
I call bs, apart from devolving probably not being a scientific concept, they're thousands of land for them to all to be degenerating at the same time seems very unlikely. I mean ape eyes evolved colour colour vision themselves
Technically, all living organisms were developed for the ocean. It doesn't mean every single one devolved because they left the ocean.
@@The-Army-Snake phrased it poorly if that's what they meant, pretty sure the idea is more that our eyes are maladapted to seeing through air, which led to some disadvantages when compared to aquatic vertebrates
@@The-Army-Snake Yeah. I can't remember where I saw it. Maybe The Cosmos. But it made sense to me. Our bodies have a ton of flaws. Feet problems cuz they were meant for grasping branches when we were primates. Our backs cuz it was made to hold our organs on all fours. Now we're upright and it's all falling down from gravity. Just a bunch of flaws for the sake of thinking good thinks and reaching the candy on the top shelf. I'll take it, though.
I'm watching this with my eyes lol!
omg same!!
lmaoo same here
2:03 so fun fact, the kinda static you see when your close your eyes comes from exactly that, its connections being made
Is it possible for someone to have a mutation where their light sensing part of the retina is facing forward?
Good thing we live in a world where LASIK surgery is a thing now.
Yeah just a 1 in a 100 chance you’ll be blind for the rest of your life
@@sayonara288 if that stat was real I doubt most people would even think of having the surgery
My mom sees halos around lights at night because of lasik, but it’s a trade off for being glasses free.
@@planetphatness i think she might be seeing god
@@sayonara288 the chances of going blind by LASIK are estimated to be close to 1 in 5 million. 1 in 100 chance? Not even close!
Good video. I really like how you mentioned that kids don’t play outside as much anymore and lead to greater issues with seeing at a distance. It’s also a part of our neurology. A specific African tribe can see more detail at greater distances because of their environment. Really cool stuff.
Childish video spouting nonsense without any knowledge just to get more views.
As many commentators have already pointed out, Cephalopod eyes are designed for use underwater so their sensors face directly to the light source to gather as much light as possible in the water.
In bright Sunlight, such a design would get overloaded or burn out the sensors.
Hence why Vertebrate eyes are designed to have extra protection from bright sunlight as the light has to bounce off the back of the eye before entering the Receptors. I theorise that there may also be some filtering of this light before it gets to the sensors.
An analogy would be Telescope types - Reflectors V Refractors.
As for the various eye ailments that modern humans have, recent research has shown that much of it is linked to our lifestyles & diet. Especially studying indoors!
So this video is actually crappy disinformation!
@@mikhan5191 Wow! Thanks for the great information. Can you expand upon lifestyle & diet? I would like to know more :)
What body part do we hav that doesn’t have a bunch of issues? Just because we haven’t figured out why something isn’t the way it is doesn’t mean it’s bad design. How dare our eyes not evolve for a life inside on a screen all day.
My teacher always said “it’s working” is hardly a reason to say a project was complete. I guess what he said was true.
That teaches me I’m not the only person just winging it.
Good content
Eyes example of convergent evolution
As a stem cell biologist I can tell that curing eye issues through stem cell transplants is currently a very promising field of research. Eyes, especially the retina are a great target for stem cell transplants as they are very accessible and can be monitored very well. What is quite cool here is that we can simply (in theory) convert cells of the patient's blood into stem cells and then into retinal cells which then can be transplanted (I plan to make a video about that myself!). Although this technology still has to be refined first clinical trials have already be started!
You sure stem cells can cure a deformed eyeball?
@@Jaylio It's not stated that _all_ eye issues might be curable.
But theoretically we may be able to grow new un-deformed eyeballs in lab and then transplant those using stem cells to grow the neuronal connections. Theoretically.
The reason may be that the saturation or the amount of photons making contact with the receptor can cause them to degrade faster over time, so it may be defensive
Fun Fact: The the Halo series this issue was addressed in lore about the SPARTAN Programs. One of the augmentation procedures is to reverse the retinas and place the ocular nerve behind it.
Evolution isnt about "survival of the fittest", it's about "survival of the good enough". Which is why we ended up with all these flaws. Tough luck, I guess :p
It's all in the minmax
2019: why the human foot is a design disaster
2020: why eyes are a design disaster
2021: why humans are a design disaster
2022: why mammals are a design disaster
2023: why animals are a design disaster
2024: why planets are a design disaster
2025: why the solar system is a design disaster
2026: why the universe is a design disaster
2027: why all matter is a design disaster
2028: why we should all just give up on life and start over
They also made videos for the back, knee, and teeth.
time to make our own evolution, with blackjack and hookers (Human revolution intensifies)
The eyes are not an engineering disaster. Taking proper care of eyes can prevent any problem one may face in the future
If you shine more light on the white page of the book you are reading your iris will make your pupil smaller so your eye will have a longer distance when things appear in focus (depth of field) even though your lens is no longer able to adjust by becoming stiffer as you age.
7:43 creepy AF
How
I think you should make a video on " Why Mammary Gland or Brest is a design disaster"..!!!
Brest is a municipality in France. 🇫🇷
@@kellykbartram8569 lol you're not wrong
Yeah. These things were designed to be perfect only before they are needed.
Religious people: "The eye is proof of intelligent design. Just look how perfect it is!"
Cheddar: "Erm, well actually..."
I started to have difficulty reading when I was in my late 20s, long before my 40s. I first noticed it reading the newspaper, and blamed it on poor lighting, because everything was easier to see when I took the paper outside to read. From about 27 to my mid 40s it got progressively worse. The readers I bought and had scattered all over the house became useless for reading but necessary to use the computer. I didn’t need glasses at all to watch a movie or TV, and only needed them to drive to see how fast I was going. Lol.
I now needed two pairs of glasses for two different functions, and my work required me to read from a computer screen, then hand write things onto hard copy, switching back and forth, with both pairs on my head if someone came into my office to talk to me. And since I didn’t need glasses to drive (it would have been dangerous because reader glasses blurred everything further away.) So I would often forget them if I had to stop in at the grocery store to pick something up on the way home. After getting home and seeing some of the ridiculous things I’d bought, the wrong beans, the wrong soup, etc, I decided this was out of control and invested in tri-focal progressives. Urban stylish on the outside, but high tech old fogey inside, no lines like grannies had, but computer generated lenses that did require some getting used to using. Some objects are closer than they appear....I used to be able to run down stairs at light speed, now, with or without glasses, but worse with, if I run down stairs, I will almost always misjudge the last couple of stairs and have to make an inelegant leap, because what I perceived to be the end of the staircase, was still one or two steps away.
So now I am resigned to wearing glasses all the time because you never know when you might have to read something, particularly with a smartphone that demands constant attention, or needs to be used for essential information. My worry now is when and how will it end, although it has slowed down quite a bit from the rapid deterioration I experienced in my 40s, it’s still occurring, I’m typing this comment on my iPad mini, and the reader area of my glasses is almost not sufficient to see all that I need to see, like, is that a comma or a period, so I will for sure need a new prescription the next time I get glasses. As Bette Davis said, “Growing old isn’t for sissies!”.
can yall just turn me into a robot already?
*insert matrix related comment here*
5:28
Why exactly does the backwards retina make the shortsightedness worse?
It's a separate problem. The backwards retina means much lower resolution or sensitivity, with increased blood vessels blocking light.
@@kirknay If they way many animals evolved a mirror to give a second light pass through the retina is any indication I'd say sensitivity is a definite issue.
@@TheAkashicTraveller if I remember correctly, that mirror is specifically for night vision. It actually ends up being somewhat of a problem for animals that are not nocturnal.
Great video!
Watching these wit my eyes
Alternative title "why you must be grateful having a pair of eyes..."
“Honey, I can’t read that sign over there”
“That’s alright, you got that ca- I mean big brain iq”
2:34/7:47 Scientists do have working hypotheses for why our retinas are set up backwards. Special cells in the retina act like tiny fiber optic cables that direct light to photoreceptors, and theres evidence that these cells can favor different wavelengths of light so that photoreceptors near this fiber optic cell primarily receive a specific wavelength. This probably enhances clarity and color vision, since forward-facing retinas would deal with more "noise" from daylight. Squid don't worry about this since they live in water and thus live with lower light intensity.
Hey, ophthalmologist here. The video was fun. There are definitely some points that we should probably clarify. Diabetic retinopathy is pronounced retin-ah-pathy. We don’t burn the new vessels because they get in the way of seeing, we burn them because they leak, bleed, and undergo fibrosis. The leakage causes the retina to swell, which disrupts its functioning. The bleeding can actually block light, but it would likely be a problem even if the retina were facing the logical direction..it’s hard to say because I don’t think cephalopods live long enough to develop diabetes...I don’t even know if they develop diabetes? Anyway, the fibrosis of these vessels causes retinal detachments. Not all detachments are caused by diabetes, but a certain subset are. Myopia is pronounced exactly as it is spelled unlike retinopathy (curse you English language). My-o-pia. I don’t think the backwards retina is involved there either. Really, most animals that spend a lot of time in the dark develop bigger eyes. In humans, the thought is that we are somehow chronically flexing our lenses to see up close which causes a stress response on the peripheral retina. This stress response results in excessive eye growth. People have tried paralyzing the muscle that flexes the lens to prevent this, and it does prevent eye growth as long as the muscle is paralyzed. Cephalopods never left their original environment, so it’s unclear if their eyes would shrink if kept in constant sunlight...I guess that would be weird. Anyway, I agree the engineering is backwards, but I would argue that human eye disease is largely an unrelated issue.
We all know that photoshop can fix any design problem. Now all we need is a reality warping editor
please, I want one
3D printing
CRISPR
Stem cells
....
Cheddar: Why the entire human is a disaster :)
Congratulations 🎉👏 of being the top comment 👍😁 (as of now 😈)
this man spitting fact
With genetic engineering in the future we might solve the problems with our body’s
you should've also pointed out the fact that since light coming from an angle gets flipped upside down by the lens, the full image the retina sees is actually upside down! your brain interprets that signal to make it rightside up though. that in turn makes processing visual information slightly longer, which in some cases could be the difference between life and death.
Recently my eyes have been blurry from afar but luckily it getting better. Im acc so thankful
My grandma of 80 has still perfect eyes.
Maybe the retina is too sensitive to light and being backward is to filter out light.
But with squids, the light underwater might less bright. So they need there retina to be not backward :P
Big brain
I actually think this is very logical
Adding a filter would work better.
You are simply using special pleading to keep your starting conclusion.
@@anomalousboreoeutherian7683
Maybe I am the Queen of England slumming it on youtube.
And there is no "correct way".
Don't start with a conclusion.
@@anomalousboreoeutherian7683
The original comment is an attempt to explain an aspect of the eye in terms of a designer.
As in maybe the designer did it that way for this reason.
That post is starting with the conclusion that we were designed.
Would love to see Cheddar design anything.
Not only our retinas are backward, but also most of our CCD are built that way!