This is an interesting article, but I found I was able to read it, for the most part, by reading the first sentence of every paragraph. That shows how much fat there is in the typical magazine article.
The myopia boom (2015)
61–70 of 73 posts
Re: The myopia boom (2015)
#62Earlier quoted context omitted.
I use my cell phone a lot more indoors than outdoors. I don't go outdoors because my cell phone enables me to connect with people indoors when I would normally be required to go outdoors to connect with them without a cell phone.
When I was a young child I was on my computer or playing video games on a TV all day, rarely going outdoors. When I got my first smartphone, it was actually very liberating. Now I could be outside anywhere, and still surf the internet and play any number of games at any time.
Afaik that's a very generational thing, people a bit older than you spend a whole lot more time outside.
My first smartphone (the first iPhone one) gave me the same liberating feeling you describe there, but it didn't take long for me to realize that mobile gaming isn't for me and while I can do most stuff I want on a smartphone, I can do it better and more efficiently on a full-blown desktop/laptop with proper peripherals, so that's where I still end up doing most of it.
In recent years my smartphone even feels more of an annoying hassle than an actual asset, except for the occasional use for navigation and regular use as mp3 player.
Re: The myopia boom (2015)
#63After reading this article, I think it's borderline cruelty to give adolescents detention during recess for misbehavior. If anything, this enables more pent up behaviors which could lead to myopia.
You make it outdoors detention, where they sit and watch other kids play. I don't know whats more cruel.
No reason to have them just sit and passively watch, let them do something outside, like tending to the school garden.
That way they do something valuable and vent whatever is frustrating them through the physical exercise.
Re: The myopia boom (2015)
#64Sunglasses are something else to consider. There is zero scientific evidence sunglasses protect your vision in any way. (There is suspicion UV exposure can lead to some eye diseases, but it's not a proven link, nor are the mechanisms understood). If increased exposure to sunlight is correlated with better vision, we better revisit our completely non-scientific sunglasses dogma.
The evidence is firming up that UV (esp UV-B) exposure is linked to cataracts and macular degeneration. https://nei.nih.gov/news/briefs/uv_cataract https://www.macular.org/ultra-violet-and-blue-light Blue light from LEDs that are out of spec can also be a problem. The EU already has standards for this. http://www.cree.com/led-components/media/documents/XLamp_Eye...
Those ailments typically present much later in life. If sunglasses protected against them while making myopia more likely, there would be a trade-off to consider.
Re: The myopia boom (2015)
#65This is an interesting article, but I found I was able to read it, for the most part, by reading the first sentence of every paragraph. That shows how much fat there is in the typical magazine article.
This is actually something many authors aim for. Few readers need all the details, but some do, and this makes it obvious where to dig. It’s harder than it looks to pull off, without sounding stilted... perhaps because it’s the opposite of storytelling, where you build up to a punchline.
Re: The myopia boom (2015)
#66Re: The myopia boom (2015)
#67Earlier quoted context omitted.
More specifically it's the bright light triggering the iris to close that improves the focus. As the aperture narrows (iris closes) the incoming rays become more collimated (less scattered) and so the image falling on your cornea appears sharper even if your eye's lens is not able to focus it correctly. At it's extreme this effect allows the pinhole camera to work without using any lenses at all to focus the image. T…
not really... seeing things under sun is not equal to squirting ur eyes to focus the incoming rays it's just that much light coming, the intensity of light to be exact. that's why camera, given the same setup, gives sharper image under bright sun light I never get as tired playing outside as compared to squirting my eyes all the time just to focus in a room. sun light is just that intense, rooms lightings are much le…
Cameras only give a sharper picture in bright light because this allows you to reduce the aperture size. The image is not sharper if you increase the shutter speed instead of reducing the aperture. This is basic physics. Bright light is not magical.
Squinting your eyes is a very poor approximation to what your irises are doing. The light collimation is not reduced uniformly in every axis and your eyelashes partially obscure the light.
Re: The myopia boom (2015)
#68This is an interesting article, but I found I was able to read it, for the most part, by reading the first sentence of every paragraph. That shows how much fat there is in the typical magazine article.
[deleted]
Re: The myopia boom (2015)
#69Hidden variable: looking at screens.
[deleted]
Re: The myopia boom (2015)
#70I always thought it was because all of the "far away" stuff is outside and a person who spends 90% of their time indoors never has to look at anything far away. What are the rates of shortsightedness among people living in dense forests (or some other cramped outdoor environment)?
I think the eye damage is more to do with looking at something of fixed distance for long periods of time (computers, tvs, tablets, & phones). A person living in a dense forest would still be constantly adjusting his/her focus.
> In the early 2000s, when researchers started to look at specific behaviours, such as books read per week or hours spent reading or using a computer, none seemed to be a major contributor to myopia risk.
is no one reading the article?