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Shortsightedness has become an epidemic

economist.com

71–80 of 424 posts

Re: Shortsightedness has become an epidemic

#71

I noticed my eyesight gets better after many hours outside not looking at any screen. And worsen after many hours in front of a screen. Is there a name for that?

Some websites call it "computer vision syndrome" [1], but it just seems like eyestrain to me.

[1] https://www.aoa.org/healthy-eyes/eye-and-vision-conditions/c...

Re: Shortsightedness has become an epidemic

#72

I wonder if indoor lighting at the appropriate temperature would help prevent this? In the UK we don't get a lot of sunlight in the winter months. It would be nice to know that we can turn on a "sun lamp" or whatever for homework time to help alleviate the issues.

Is it really an issue though? My glasses have saved me from injuries to the eye multiple times by flying objects, I'm actually thankful I have them.

Re: Shortsightedness has become an epidemic

#73
post #30

Earlier quoted context omitted.

Because glasses suck, and we don't wanna condemn future generations to wear them if they don't have to (and they still can if they so choose, of course).

They’re good if you don’t like stuff flying into your eyes when you’re outside.

Luckily you can still use them for that even if you no longer need them for vision correction :-)

Re: Shortsightedness has become an epidemic

#74
Why can we have 2-lense glasses that move the focus to infinity?

ELI5: In opticals, “rays” coming from a near object (=mobile phone) are angled, while rays coming from afar (=end of a landscape) are parallel. The job of pupils is to bend the rays from the focal point ahead to the focal point on the receptors in the eye. The eye is a rest when looking afar, because rays come parallel, and thus there isn’t much to do. The eye is strained when trying to focus one something closer.

I’ve always wondered why we all had that UV filter on screens and never took care of making the rays from the computer screen parallel, using a lense.

Re: Shortsightedness has become an epidemic

#75

I feel like this has always been a rather obvious thing...for at least what nearly a century or more? The whole trope of glasses are for nerds. Kids who spend time reading a ton are nearsighted. I understood this in elementary school, when the only kids with glasses were the smart ones. (I hated reading, and did not wear glasses, so was not a 'smart one'). I became nearsighted not long after getting a home computer,…

It was kind of common knowledge that something related to being a nerd was causing myopia, but I'd say most people assumed that the culprits were things like reading and screens, rather than being indoors. Hindsight is 20/20.

I replied elsewhere...I disagree that light type is the culprit. If so, why do people in areas without electricity become myopic? That strongly feels like correlation rather than causation at its finest.

My brother and I were kids with mostly similar habits. We spent a lot playing outside, but he loved reading his Goosebump books, while I mainly watched TV at a distance. He needed glasses as a kid, and I didn't until we got a computer in my teen years. It completely feels like it's a focusing distance issue.

Re: Shortsightedness has become an epidemic

#76

I wonder if indoor lighting at the appropriate temperature would help prevent this? In the UK we don't get a lot of sunlight in the winter months. It would be nice to know that we can turn on a "sun lamp" or whatever for homework time to help alleviate the issues.

> In the UK we don't get a lot of sunlight in the winter months

Thus, are more people nearsighted in UK than in the South of France?

Re: Shortsightedness has become an epidemic

#77

I didn’t realize the evidence is strong that daylight keeps kids from becoming near-sighted. Making young kids study all the time is killing their eyesight!

I sometimes wonder if UV protective glasses block some possible benefit of UV light to eyes.

I have often wondered this myself, but the dangers of UV light seem to be well documented, with no benefits.

If you wear UV protective glasses most of the time you can almost elimate cataracts.

The UV index here in southern Australia tends to be high to extreme most days during the warmer months, so I tend to wear UV protective sun glasses anytime I'm outside.

Re: Shortsightedness has become an epidemic

#78
post #41

Earlier quoted context omitted.

Myopia is a risk factor for floaters, retinal detachment, and glaucoma. It's objectively not neutral, despite that glasses exist. Glasses are also inconvenient, cost money, can be lost or broken, and don't cover the entire field of vision, and contacts have their own problems.

I can't believe you're serious. I wear glasses and there's nothing wrong with me. Last thing I want is to live in a world where I'm pressured to be genetically engineered for having the wrong kind of eyes.

If there’s nothing wrong with you, why are you wearing glasses? I wear hearing aids because my hearing is flawed. I would be ecstatic if there was a genetic solution.

Re: Shortsightedness has become an epidemic

#79
It may just be a pet peeve, but it rankles me a bit when the term "epidemic" is used to describe widespread conditions that are not communicable/infectuous. Looking at the dictionary it appears the usage here is legitimate, but my guess would be that it is a misuse that has become accepted, like using the term "begging the question" to mean suggesting the question.

Re: Shortsightedness has become an epidemic

#80

I feel like this has always been a rather obvious thing...for at least what nearly a century or more? The whole trope of glasses are for nerds. Kids who spend time reading a ton are nearsighted. I understood this in elementary school, when the only kids with glasses were the smart ones. (I hated reading, and did not wear glasses, so was not a 'smart one'). I became nearsighted not long after getting a home computer,…

But that's not happens, it's not that your eyes get adjusted to only seeing things closer, rather they don't develop well unless they are exposed to sunlight. Which just goes to prove it hasn't really been obvious all along.
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