The Nearsightedness Epidemic

  • Published on Dec 30, 2015
  • While not the kind of epidemic you're used to hearing about, nearsightedness is becoming a major health issue in many places. Learn about how scientists are finding out the reasons behind the increase in myopia, and how sunlight might be an important component.
    Hosted by: Michael Aranda
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    Sources: (pp 18-20)

Comments • 3 532

  • Harold Kline
    Harold Kline Day ago

    When people are outside they focus on things that are farther away. This helps their eyes stay healthy through natural use and exercise. If nearsightedness is the loss of ability to see things farther away, then it stands to reason that the eye needs more practice and exercise focusing on things farther away. The only place one can do this effectively is outdoors. I think they are over-thinking this one.

  • ɮօʊռċɛ օʄʄ
    ɮօʊռċɛ օʄʄ 2 days ago

    We need an update video about this topic please.

  • Magic
    Magic 2 days ago

    Wait a minute I live in northern US and spend VERY little time outside, and yet I have 20/20 vision, as stated by my doctor? I'm confused.

  • David
    David 2 days ago

    But smart phones and video games are to blame, because children spend all their time inside using electronics instead of playing outside. God, I sound like my parents. It is true though.

  • Graeme Mark
    Graeme Mark 3 days ago

    I wasn’t short-sighted ‘til I was 29... Explain that science! 😉

  • Petra44YT
    Petra44YT 4 days ago

    Interesting! I wasn't nearsighted until the first of several high-dose steroid treatments (1,000 mg i.v. per day over 3 to 5 days).

  • Zeref Uzumaki
    Zeref Uzumaki 6 days ago


  • Michael Paone
    Michael Paone 6 days ago

    Why don't we just figure out additional ways to increase retinal dopamine too!?

  • all motor
    all motor 7 days ago

    your thesis is wrong. as a kid I played baseball, soccer, snow ski, AND surf I'm legally blind without my contacts/glasses. its due to genetics or genetic expression. so to correct your thesis. SOME people MIGHT benefit from sunlight.

  • Leisure 七転び八起き

    “The antidote to nearsightedness might be good ol’ fashioned sunlight”
    Me: *runs outside and directly looks at the sun*

  • inmemory oflael
    inmemory oflael 8 days ago

    Meh, install full spectrum lighting in your home and you've got the best of both worlds, especially for those that have difficulty getting time outside due to climate or health issues.

  • Hugh Cipher
    Hugh Cipher 8 days ago

    This is the obvious source of the "people who wear glasses are smart" stereotype. I unfortunately have high myopia & may need eye surgery soon. My eyesight is horrible & I hate it

  • Keith morgan
    Keith morgan 9 days ago

    So bigger windows in class would do the job. More so if they have something far away to focus on. Which is the real cure.

  • Theron Thunder
    Theron Thunder 10 days ago

    Glasses?education?glasses?education? I’ve went with education up until now and I’ve already got glasses so to late to turn back BUT there’s a thing I discovered in my education that’s called LASIK eye surgery. So people with glasses do not fear! We have been saved by nerds that are nerdier than us and decided to nerd up and solve it with SCIENCE and LASERS!
    DISCLAIMER: If your eyes are still developing (although that’s kind of our problem) then you won’t want to get the surgery as it could affect your development process.

  • Debbie Bezalel
    Debbie Bezalel 12 days ago

    Okay my dad is nearsighted, but my mom has great vision, and me and my siblings all wear glasses im the first born and im nearsighted (my myopia is worse than anyone in the family, even my dad), my sister has myopia too but not that bad, and my little brother is farsighted, my myopia gets worse every single year, while my sister's has stayed the same for over 2 years, i guess it has to do with the genes, because i go outside more than her to walk my dog SHE JUST SLEEPS AND WATCHES NETFLIX ALL DAY AND I DONT UNDERSTAND, and im afraid im going to be freaking blind by the time im 50

  • Miles Huff
    Miles Huff 12 days ago

    Nearwork causes Computer Vision Syndrome, which is temporary myopia.

  • Titanic
    Titanic 14 days ago

    Do I have high Myopia?
    My vision starts to blur at about .5 to .9 meters away. I can squint and increase it to 1 to 1.2 meters.

  • Christopher Jovez
    Christopher Jovez 15 days ago

    Did you ask some of your sources for permission to mention the information in your video or are you relying on fair use? (I wish all articles were open access)

  • Rowan Lore-Hale
    Rowan Lore-Hale 18 days ago


  • Jessica
    Jessica 18 days ago

    So I guess in the olden days, there wasn’t much technology like iPads so people went outside more. Now the is lots of technology so people don’t go outside and that is why more people have Myopia these days.

  • Faith Wolves
    Faith Wolves 19 days ago

    I think this is true. When I was younger I was always outside, but then I stopped because I live in the desert and it's hot. I kept this up for about 3 years, and now I have glasses ;-;
    Because near sightedness

  • Jasmine Vasquez
    Jasmine Vasquez 20 days ago

    He has a nice nose

  • Albert J. Nguyễn
    Albert J. Nguyễn 21 day ago

    Lasik 20 minutes, Sunlight 20 years.

  • hannan veera
    hannan veera 21 day ago

    So just stare at the sun

  • Sean Brunswick
    Sean Brunswick 21 day ago

    What about global warming?

  • a tired bee
    a tired bee 21 day ago

    I wonder if part of it might be the distances required to see the different environments? like if bear work might be a factor though you said it was inconclusive, a person who stays indoors a lot might not have as much need to see 200 feet away as someone who is outdoors a lot. unless theyre spending a lot of time in giant rooms i guess. dunno if thatd be possible though.

  • Arianna Silva
    Arianna Silva 25 days ago

    I've been severely nearsighted since I was 4 and have had a lazy eye since I was 8 months old. I am now 18 and odds are I'll have serve nearsightedness when I am 30 or sooner.

  • Zameel Mohammed
    Zameel Mohammed 25 days ago

    The link is actually between both near work and outdoor time.That's what the researchs show. The rate is not high in cases where people are involved in near work but compensates with outdoor activities.And is high in the vice-versa-case.

  • TigerShark
    TigerShark 26 days ago +1

    i thought whacking off caused this

  • Doomfire01
    Doomfire01 27 days ago

    Radiation to the eyes and magnetic fields all around us tv and cell phones .....

  • Winter 冬
    Winter 冬 27 days ago

    That feel when your eyes are so bad, you can't see the big "E"

  • Nexus5 Google
    Nexus5 Google 27 days ago

    I guess the conclusion is: the smart people eye disease can be prevented by keeping smart devices at 100% brightness.

  • Fuck Google
    Fuck Google 27 days ago

    Did anyone else notice the correlation between heavily polluted areas and myopia? The reason why the Alaskan natives had a rise in myopia is because civilization came in, installing oil refineries, factories, and other sources of pollutants. In China pollution is notoriously high as is myopia. But I have yet to hear about a smog alert in Australia. The reason why going outside was not as beneficial as hoped is because sunlight can't help you if it can't reach you due to a near-permanent haze of pollution. The Alaskan natives didn't have this problem before because the atmosphere was clearer, allowing them more sunlight- just enough to prevent this problem. Unfortunately it didn't take much to screw that up. Furthermore, we are seeing an ever increasing occurrence of illness in wildlife which is directly linked to our pollution. To think that humans would not be affected by this as well is a complete detachment from reality.

  • Nuvia Reyes
    Nuvia Reyes 29 days ago

    I have high myopia and I'm a teen. Well I'm screwed

  • Cam
    Cam Month ago

    Do sunglasses decrease the benefit of sunlight?

  • Poop Brain
    Poop Brain Month ago

    why is michael so hot?

  • Nexus
    Nexus Month ago

    weird. is farsightedness the same thing or is it related more to genetics?

  • Apollos Elite
    Apollos Elite Month ago

    I spent my everyday outside as kid and still as am adult and am still extremely nearsighted. I also studied hard though and was the first of 5

  • Mike Roberti
    Mike Roberti Month ago

    When the wife asks me to “work” on a household project on the weekend, what I actually end up doing is “near” work.

  • DH Seret
    DH Seret Month ago
    Myopia Study is "20/40 Myopic"
    Med/Sci research has shown that DOPAMINE, other neurotransmitters such as Serotonin, hormones such as Testosterone, Cortisone, and Oxytocin are released by:
    1. ACTIVITIES including Execise, Sex, Human and Pet interaction, Intellectual Pursuits
    2. Mood/Stress/Competition
    3. Light + COLORS e.g.
    - RED for competitive team uniforms
    - BLUE for "Ambience"
    - DAYLIGHT [Diurnal Rhythm]
    2G Ophthalmologist
    Self proclaimed "Visionary-ORacle"

  • Safir
    Safir Month ago

    ... watching on an ipad pro

  • Somtochi Ohakah
    Somtochi Ohakah Month ago

    I've been wearing glasses for more than a year, and it seems to have gotten worse, compared to before I ever wore glasses 😐

  • Somtochi Ohakah
    Somtochi Ohakah Month ago

    NONE of my parents are nearsighted, so how did I get it?

  • B Blessed
    B Blessed Month ago

    Not education maybe focused strain on the eyes? Pollution in other countries forced to study in side unnatural lights maybe?

  • A Woods
    A Woods Month ago

    It’s too bad it can’t reverse damage already done.

  • Filip Třeba
    Filip Třeba Month ago

    Well, Anecdotical evidence and all, but my sister (1 of 2), my parents and all grandparents are near sighted. Except mom's mom all of them spent most of their life outside, whether traveling, doing sports or farm work. On the other hand I, for the most part, only see daylight when moving between job and home, and my eyes are fine...

  • cLuTcH BleacH
    cLuTcH BleacH Month ago

    Far sighted asf so that's good I guess.

  • Abedin Durakovic
    Abedin Durakovic Month ago

    I dont mind wearing glasses, they are mad confortable 🤓

  • MissPronounced
    MissPronounced Month ago +1

    So, can we possibly test the correlation between depression/mood disorders and myopia? I'd be curious to see that tested. I have depression thanks to genetics, and myopia.

  • Nichol John
    Nichol John Month ago

    I spent most of my childhood outdoors, still I developed myopia when I was 10, just before I had a phone. And now I have a moderate myopia, it got worse when I was 14 and I don't know why. Now thank goodness, my myopia is now stable.

  • Amanda M
    Amanda M Month ago

    I'm outside all the time, even as a kid. I still got myopia.

  • TheEnderman36YT
    TheEnderman36YT Month ago

    This video = the story of my life

  • Sean W
    Sean W Month ago

    If dopamine is possibly related to eye development, does this mean that there is possibly a biological link between myopia and psychological issues related with dopamine function (depression, ADHD, etc)?

  • Spice Warrors, Sea Mist WoF

    Yayyyy Nearsited! Go First bornes!

  • Tnaz
    Tnaz Month ago

    Okay weird story
    I used to be in my community soccer team
    About 2 years ago I quit the team
    Since then my myopia worsened



    Well I had a strict parent growing up that I had to be indoors before sundown. And I was partially traumatized as a child over a family member. So, I guess I wasn't exposes to enough sunlight and not too happy to release enough dopamine. I didn't have near sight in elementary school. It wasn't until I turned 13 when the school nurse suggested I see an eye doctor.

  • Ciptep and Jaslinxoxo GT-Games - and scams fail

    parents : go out and play don’t stay indoors for too Long and rest your eyes stop playing with your mobile indoors. 😾
    me: ok. -goes out, bring my mobile outdoors and play with it .-

  • Benjamín Gonzalez
    Benjamín Gonzalez Month ago

    I’m near sighted and I always stay inside (I’m a nerd deal with it). And most of my classmates that are “jocks” are not near sighted. Sorry If i spelled something wrong or i was Grammatically incorrectly I am 10 (deal with it )

  • Megan Thompson
    Megan Thompson Month ago

    It must be from studying because my brother is older by 2 years and I am nearsided and and he is not and I spend a lot of time studying in my free time. I know I'm that weird kid that their free time learning

  • Smirkingrin
    Smirkingrin Month ago

    I'd rather increase my myopia than increase my risk of cancer, anyways technology is on the rise, nobody stress out or worry too much, soon you'll be able to get eye surgery, in 10 years or so, a bit later you might be able to get eyes produced out of your own dna with accelerated growth thanks to stem cell commands

  • Ian
    Ian Month ago

    I was with born near sighted and I have an astigmatism so I am assuming mine is genetic.

  • Alexa Bella Muerte
    Alexa Bella Muerte Month ago

    Ok but now they're gonna get skin cancer

  • Gavin Starks
    Gavin Starks Month ago

    So my mom IS wrong when she says gets some sun.
    Edit: Nvm... I finished the video.

  • Nathan Metcalf
    Nathan Metcalf Month ago

    Arms length? My vision gets blurry after six inches

  • Kevin Rippy
    Kevin Rippy Month ago

    Genetics could have a good part to do with it though. Recently glasses are now a good looking thing, so glasses got hotter, and evolution did its thang

    Also im joking. No hate.

  • The Blackspider
    The Blackspider Month ago

    I'm nearsighted

  • Accessless
    Accessless Month ago

    Excellent, so the paedophile epidemic has caused the near-sightedness epidemic because no one is willing to let their kids outside.

  • Majestic
    Majestic Month ago

    My entire family wears glasses because of nearsightedness, including me. 🤓🤓🤓🤓🤓🤓

  • Chiara Coco
    Chiara Coco Month ago +1

    That makes sense because nerds are known for wearing glasses, and since many are introverted they tend to not participate in social activities and stay indoors studying or watching educational you tube videos
    *is watching educational you tube videos about nearsightedness*

  • Wolftamer Wolfcorp
    Wolftamer Wolfcorp Month ago

    but I stared at the sun all the time as a child and I'm still near sighted

  • Joel Su
    Joel Su Month ago

    It's cause people who wear glasses are nerds!

  • Canyon F
    Canyon F Month ago

    Fake news. The Outernet is scary and I don't like it

  • Jillianne Fanning
    Jillianne Fanning 2 months ago

    And THAT is why people associate blindness with smartness!!

  • Matthew Medeiros
    Matthew Medeiros 2 months ago

    Personally I think it's a combination of not enough sunlight and also nutrient deficiencies that relate to the health of the eye

  • BlueBerry
    BlueBerry 2 months ago

    My hair is so greasy right now each time I would rub my head my hand feels weird and then my phone is greasy now

  • HortiMyth
    HortiMyth 2 months ago

    But doesn’t sunlight exposure cause skin cancer?

  • Catherine Melone
    Catherine Melone 2 months ago

    Vets have known for a long time that pet reptiles raised without proper UV lighting are likely to go blind

  • Quantum
    Quantum 2 months ago

    I have 20/20 vision and sit in front of a screen almost 24/7

  • SamuraiPenguinStudio
    SamuraiPenguinStudio 2 months ago

    I would postulate that going outside also comes with being forced to use far-sighted focus a lot more on top of things like sunlight. After all, when you're outside, your eyes can't help but put focus on things ten, twenty, or hundreds of meters away. (And I'm not the only comment that shares this sentiment). The eyes have muscles. And as the term goes for body functions: "Use it or lose it."

  • trent humphrey
    trent humphrey 2 months ago

    One of your guys best videos yet. Great job.

  • Atom Odyssey
    Atom Odyssey 2 months ago

    I'm near sighted, so is my father and mother, but my brother isn't, I always went outside more than him as a child, and I got the eye troubles, wtf world

  • Elizabeth Ann
    Elizabeth Ann 2 months ago

    *Too bad there’s no recess in middle or high school.*

  • Elizabeth Ann
    Elizabeth Ann 2 months ago

    If someone already has myopia is there any evidence saying that more sunlight per day could help treat it/ slow it’s progression?

  • TragestyX
    TragestyX 2 months ago

    I just recently developed Myopia. I'm hoping it's temporary. I wish I logged down exactly when it first started. Can't tell if it's a week or 2 weeks.

  • IntarwebUser
    IntarwebUser 2 months ago

    So what we need are sun rooms to do our homework in.

  • Emily Matheny
    Emily Matheny 2 months ago

    So basically math makes us nearsighted?

  • Ashlee Knowlton
    Ashlee Knowlton 2 months ago

    Yes! Yes! And yes some more! I didn't have a problem with nearsightedness until I started spending more time inside. I've been saying for years fluorescent lighting makes my eyes tired. If I'm inside a lot like when I worked in a Sam's Club I had to wear my glasses and go outside to give them a break so I could see clearly.
    I have almost 2020 vision and sometimes I can't see the words in front of my face!
    I have a very slight astigmatism. I could never explain why it seems like my vision would go through phases. Because sometimes it was better than others and then I realized that fluorescent lighting was affecting me negatively and I actually needed sunlight.

  • LeFlavius_NL
    LeFlavius_NL 2 months ago

    in other words

  • Video Gamer
    Video Gamer 2 months ago

    What is this thing you call "outside?"
    Is it a disorder or something? Is it a new gender?

  • Daniel Prince
    Daniel Prince 2 months ago

    This can explain the fact for why my far sight vision improves when I am out playing sports in the bright sunny day.

  • mechadense
    mechadense 2 months ago

    A major problem is that there are still no sunlight readable general purpouse screens available.
    (not counting ultraslow black and white e-paper or ultabright active displays that massively waste energy). Sadly mirasols IMOD technology seems to not have made it. It seems the average buyer just goes for the most brilliant colors.

  • IonIsFalling7217
    IonIsFalling7217 2 months ago

    I am an oldest child and myopic, but I spent PLENTY of time outside.

  • Etrinix IU
    Etrinix IU 2 months ago

    Soo... Artificial light is the cause? Go figures

  • Kinda Good Lyric Videos

    My older brother, the first born of my family, has glasses, but he's okay without them. Me, the second child, needs glasses badly. With my glasses off, I can barely see 3 inches in front of me.

  • Calla Schiefelbein
    Calla Schiefelbein 2 months ago

    Who else went outside after watching this video?

  • memo a
    memo a 2 months ago

    Maybe pollution is the cause like China ?!

  • Jay J de Pinto
    Jay J de Pinto 2 months ago

    I went sailing one day and was the spotter, meaning I had to spot the buoys for us to navigate, which were far away, so I was always looking at the distance. I noticed when riding my bike home, I saw the surroundings a little clearer.
    The sun wasn't shining that day. Can we train our eyes to focus by looking at the distance?

    • Jay J de Pinto
      Jay J de Pinto 2 months ago

      I was also terribly nearsighted while having played outside every day. I got contacts when I was 11 because with just glasses my miopia would worsen by 1 point every year, with my contacts it only went up (or down?) 3 points in 16 years.

  • Sandra Hawkins
    Sandra Hawkins 2 months ago

    I'm farsighted

  • Yakarot Sennin
    Yakarot Sennin 2 months ago

    But, IS IT TOO LATE TO GET BACK TO 20/20 vision!??