Your eyes use muscles to focus, if you are always looking at things close to your face your muscles do not get much in the way of exercise and become slow and weak. Things like screens are worse because they are completely flat, pages of a book require some work because the pages are not actually flat and your eye adjusts to the change in distance as you work across the page but still only work a small range of the eyes muscles.
That is the only way reading can cause eyesight to worsen and can and does happen. Or do you think the muscles of the eyes are somehow magic and retain their full function regardless of use?
We are assured by optical metaphysicians, or metaphysical opticians, that, in the operations of vision, we never get beyond the eye itself, or the representations that are depicted therein. We see nothing, they tell us, but what is delineated within the eye. Now, the way in which a plain man should meet this statement is this—he should ask the metaphysician what eye he refers to. Do you allude, sir, to an eye which belongs to my visible body, and forms a small part of the same; or do you allude to an eye which does not belong to my visible body, and which constitutes no portion thereof? If the metaphysician should say that he refers to an eye of the latter description, then the plain man's answer should be—that he has no experience of any such eye—that he cannot conceive it—that he knows nothing at all about it—and that the only eye which he ever thinks or speaks of, is the eye appertaining to, and situated within, the phenomenon which he calls his visible body. Is this, then, the eye which the metaphysician refers to, and which he tells us we never get beyond? If it be—why, then, the very admission that this eye is a part of the visible body (and what else can we conceive the eye to be?) proves that we must get beyond it. Even supposing that the whole operation were transacted within the eye, and that the visible body were nowhere but within the eye, still the eye which we invariably and inevitably fill in as belonging to the visible body (and no other eye is ever thought of or spoken of by us),—this eye, we say, must necessarily exclude the visible body, and all other visible things, from its sphere. Or, can the eye (always conceived of as a visible thing among other visible things) again contain the very phenomenon (i.e. the visible body) within which it is itself contained?
-A Speculation on The Senses (1883)
by James Frederick Ferrier
You can make yourself near-sighted if you constantly are looking at very close up things.
Make sure you spend some time everyday looking at far away things, so your vision is healthy.
The body adapts to what you make it do, so just taking some time outside to walk and look at the sights around you will counteract the negative effects of reading
Only if the cause is the muscles of your eye not getting enough use. My eyesight improved a few years ago when I started sailing and my optometrist knew something in my life changed just by how my prescription changed, my eyes constantly having to adjust their focus between the horizon and the boat gave them a good work out. Apparently in much of the world optometrist will prescribe exercises instead of glasses for some people and it works. The catch is that other things also cause your vision to worsen and many of these are just age related or genetics.
You certainly can.
Read too much, get sleepy, just one more chapter, you stand up, you feel a bit light headed, your heart is beating rapidly what the frick its as if you've been running a marathon you reach out to grab anything to make it stop and then a dull pain followed by the deep dark.
When you awake everything is so fricking bright it's as if you walked outside after being asleep, it's been several minutes and it's not adjusting, something's changed and you barely remember what happened before you fell.
You explain to your doctor, they run some tests and now you're 100% colour blind and have light sensitivity issues and migraines.
I'm sorry, you'll never see the same again.
Take note bookworms. Always wear a crash helmet during a late night sesh; being nearsighted is the least of your problems. Death may even be preferable if you have wiped your hard drive and emptied your piss bottles.
Maybe, if you already are predisposed to vision problems and then you read small print in shitty lighting and strain your eyes over a long period of time. I think eye problems are mostly genetic though.
yes, if you read in poor lighting you can worsen your eyesight
What if you read in good lighting?
Your eyes use muscles to focus, if you are always looking at things close to your face your muscles do not get much in the way of exercise and become slow and weak. Things like screens are worse because they are completely flat, pages of a book require some work because the pages are not actually flat and your eye adjusts to the change in distance as you work across the page but still only work a small range of the eyes muscles.
That is a myth.
Everything you said except the part about focus needing muscles is wrong.
That is the only way reading can cause eyesight to worsen and can and does happen. Or do you think the muscles of the eyes are somehow magic and retain their full function regardless of use?
No, only if (you) jerk off too much..
A plethora of grade-school teachers, and librarians, that wear glasses should have answered that for you.
Don't worry. Your eyes aren't seeing anyway. It's all in your brain.
We are assured by optical metaphysicians, or metaphysical opticians, that, in the operations of vision, we never get beyond the eye itself, or the representations that are depicted therein. We see nothing, they tell us, but what is delineated within the eye. Now, the way in which a plain man should meet this statement is this—he should ask the metaphysician what eye he refers to. Do you allude, sir, to an eye which belongs to my visible body, and forms a small part of the same; or do you allude to an eye which does not belong to my visible body, and which constitutes no portion thereof? If the metaphysician should say that he refers to an eye of the latter description, then the plain man's answer should be—that he has no experience of any such eye—that he cannot conceive it—that he knows nothing at all about it—and that the only eye which he ever thinks or speaks of, is the eye appertaining to, and situated within, the phenomenon which he calls his visible body. Is this, then, the eye which the metaphysician refers to, and which he tells us we never get beyond? If it be—why, then, the very admission that this eye is a part of the visible body (and what else can we conceive the eye to be?) proves that we must get beyond it. Even supposing that the whole operation were transacted within the eye, and that the visible body were nowhere but within the eye, still the eye which we invariably and inevitably fill in as belonging to the visible body (and no other eye is ever thought of or spoken of by us),—this eye, we say, must necessarily exclude the visible body, and all other visible things, from its sphere. Or, can the eye (always conceived of as a visible thing among other visible things) again contain the very phenomenon (i.e. the visible body) within which it is itself contained?
-A Speculation on The Senses (1883)
by James Frederick Ferrier
No but you can partially lose your eyesight by pushing your eyeballs into your sockets or by staring at the sun.
source?
Personal experience.
You can make yourself near-sighted if you constantly are looking at very close up things.
Make sure you spend some time everyday looking at far away things, so your vision is healthy.
The body adapts to what you make it do, so just taking some time outside to walk and look at the sights around you will counteract the negative effects of reading
Can you become normal-sighted again after being near-sighted?
Only if the cause is the muscles of your eye not getting enough use. My eyesight improved a few years ago when I started sailing and my optometrist knew something in my life changed just by how my prescription changed, my eyes constantly having to adjust their focus between the horizon and the boat gave them a good work out. Apparently in much of the world optometrist will prescribe exercises instead of glasses for some people and it works. The catch is that other things also cause your vision to worsen and many of these are just age related or genetics.
not normally
You certainly can.
Read too much, get sleepy, just one more chapter, you stand up, you feel a bit light headed, your heart is beating rapidly what the frick its as if you've been running a marathon you reach out to grab anything to make it stop and then a dull pain followed by the deep dark.
When you awake everything is so fricking bright it's as if you walked outside after being asleep, it's been several minutes and it's not adjusting, something's changed and you barely remember what happened before you fell.
You explain to your doctor, they run some tests and now you're 100% colour blind and have light sensitivity issues and migraines.
I'm sorry, you'll never see the same again.
Take note bookworms. Always wear a crash helmet during a late night sesh; being nearsighted is the least of your problems. Death may even be preferable if you have wiped your hard drive and emptied your piss bottles.
Maybe, if you already are predisposed to vision problems and then you read small print in shitty lighting and strain your eyes over a long period of time. I think eye problems are mostly genetic though.