Why might reading make people myopic?
eye-tuebingen.de
eye-tuebingen.de
Is there an explanation for why the choroid changes its thickness, and why this change would create an opposite effect in eye growth over a longer period?
The fact that it's geometry is roughly static around a focal length that has sharp focus on the retina is a wonder of homeostasis with at least three known tuning loops: 1) the lens Moving on swiftly... 2) a slower feedback loop adjusting the choriod (hence focal length) in the order of hours. 3) an even slower loop adjusting the eye geometry over longer periods of time.
We end up at a myopic static point where the balance of forces match.
Big lens wins.
I wonder how much these are correlated.
Perhaps we evolved to "make use" of UV light to halt our eyes growth.
There was a study that followed Chinese kids who stayed in China vs Chinese kids who moved to Australia. There was a marked difference.
Not sure if its about sunlight or near/far focus though.
I have seen some suggestion that it is a combination of both. Either is plausible though.
In my very early 20s, I suddenly found white text on a black background extremely irritating. Suddenly, my vision was filled with persisting horizontal lines. (Like what you get when you look quickly at a light bulb.)
Maybe it's because DOS was really grey on black, but on the web, people typically do bright white on black?
Not helping matters is the rise of glossy distraction screens, again before the turn of the century the status symbol was ultra low glare matte screens to avoid eyestrain and with the conversion to everything must be shiny its hard to look at a black background reflecting tons of distracting moving shadows so everything must have a white light blackground to cut thru the bright distracting reflections.
What does non-linear mean? And what do you mean tolerate?
Before LCD screens all Macs were black-on-white and people loved it. The first Macs were monochrome. I don't recall anyone ever having a problem with it.
Also, I don't remember any matte CRTs -- they're all glossy because their surface is glass.
Really confused as to what you're talking about.
Sony Trinitron https://en.wikipedia.org/wiki/Trinitron
Mac's were color pre-LCD too. https://en.wikipedia.org/wiki/Apple_Macintosh_Color_Display
I still emulate the Kaypro 10 with its dull/bright green on black phosphors for coding.
How does this account for things like Atari TOS, MacOS, OS/2 or any early version of Windows that all mainly use black on white for text? The "web era" depending on how you define it could of course have coincided with the LCD era (though in my experience happened more than half a decade earlier, which is generations in computer technology time) but the web didn't somehow invent black text on white backgrounds.
It's so much less strain on the eyes, especially during the night or after waking up. Going from darkness to a blazing white screen literally hurts in the eyes.
When I'm forced to use black-on-white (i.e. when browsing most of the web), I find that reduced brightness and increased monitor colour temperature helps a lot.
My normal color scheme is a slightly modified 'desert' theme that comes with vim.
Just switch to a busable protocol. I don't see what the issue is here.
Another reason to use dark themes.
filter: invert(100%);
Which is also why it's more relevant to body text, as opposed to display text which is larger and thus less susceptible to the problem.
Essentially turning "genetic lottery" into "genetic basic income".
This combination of words doesn't make any sense.
Note that this is not an endorsement of Bates' or any other method supposed to implement this in practice. I'm just noting that putting "muscles" and "myopia" in the same sentence isn't non-sensical.
> in fact, that's a part of what happens when you get atropine drops during an eye exam
Even a fully paralyzed ciliary muscle cannot overcome a wrong geometry of your eye. Whether atropine has any real effect on myopia is controversly discussed.
As for the rest, like I said - I don't endorse any of the proposed exercise regimens or see much support for them. I was simply pointing out that muscles do affect eyesight and briefly explained how.
I doubt that. Yes, small children tend to have high ciliary muscle tone, resulting in errors of 0.7D in average. That's well known and that's the reason for cycloplegic refraction. But what's the effect for adults? 0.2D on average?
Atropine works by temporarily blocking the contraction of the muscle sphincter pupillae (which along with dilator pupillae is responsible for the contraction of the pupil). The cilliary muscle isn't involved. The rest of your comment stands, though.
Atropine is also a mydriatic agent (dilates the pupils) and this lets you better see the retina, but that's a different effect than the one I was referring to.
Whereas when you think about it staring at dark symbols on a bright background is really unnatural and therefore it is reasonable that it can affect visual development.
But I'm not myopic, but astigmatic.
Not trying to nitpick, just curious if this is actually correct grammar or not.
https://ell.stackexchange.com/questions/43482/a-transitive-v...