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Myopia why? elongated eyeball, ciliary muscles, dreams

myopia eyesight eyes eye-sight ciliary

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#1 Young Paul

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Posted 16 March 2012 - 10:00 AM


I'm a bit confused about the main cause of myopia because there are so many different thories.
the way I've been told is because the ciliary muscles that contract when looking at a close work to accomodate and relax when looking at a distant object. With too much close work the muscles get stuck in the contracted position and then have difficulty in relaxing. Other theories are that the eyeball changes shape and gets longer.
There's a massive difference in stats for myopia with people who work at computers or do a lot of reading against those who work outside without any close work. Most of the bookworms I know wear glasses, or is due to lack of sunshine?

I would love to know that when we close our eyes do the ciliary muscles relax, or when we sleep, and if we dream about knitting, playing chess, cards, reading, do the ciliary muscles contract, and if we dream about looking at the stars, or horizon do they relax? I have a pair of pinhole glasses and when I use them my myopia is instantly cured, but I wonder if the eye muscles actually relax, or just a trick of light.

#2 niner

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Posted 16 March 2012 - 01:05 PM

I have a pair of pinhole glasses and when I use them my myopia is instantly cured, but I wonder if the eye muscles actually relax, or just a trick of light.


I have hyperopia, and looking through a pinhole acts like a corrective lens for me too. This is just the physics of light. It can come in handy when I don't have my glasses on and I need to sharpen my vision; I put my fingers together in a way that makes a small hole, then look through it. Weird, but it works. I've never seen pinhole glasses, but that's a great idea. I wonder if people in the third world who can't afford lenses use them? They could be made for pennies, and would be better than being semi-blind.

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#3 nickthird

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Posted 17 June 2019 - 05:00 PM

There is no confirmed reason for Myopia that has been established.

 

The only thing that I am aware of, which is recent, is that there have been studies on children where those that were exposed to stronger light intensity (usually outside), had reduced myopia incidence or progression.



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#4 YOLF

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Posted 17 June 2019 - 08:06 PM

Perhaps opening the iris in low light deforms the muscle actions responsible for focusing in such a way that they are more easily exhausted or simply don't get used enough and is further complicated by the growth response of the iris muscles getting larger?

 

Perhaps my myoptickinetics are wrong, but someone who knows more about the workings of eye anatomy could reinterpret my theory with the correct assumptions?

 

Do you know it's not cataracts?

 

I notice that in my case there is a persistence of vision lasting 1-2 seconds after I cover one of my eyes where my visual clarity remains just as good... how can one determine though how could one determine whether it is or isn't myopia, cataracts, or some other phenomena?

 

 







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