what really happens to your eye when you are a near-sighted person??
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If you are short sighted your eye ball is too long. That means the refractive power of your lens is too strong, and it focuses any image in front of your retina instead right on it. As a result the image is blurry.\nAs the lens has to become more refractive anyway for looking at things close up, you don't have as much a problem there, actually you can see things still in focus at a shorter distance than normal sighted people can. (Look up accommodation of the eye, I've pasted the first website I came across at the bottom, but I am sure you can find more). \nIf you get glasses for short sightedness, they are the kind which disperse light more (concave) and that will correct for it. (Means also if you are stranded on a desert island you won't be able to use them to make fire.)\nGlasses do not make things worse, but that depends a lot of your age and the glasses. \nWhile you are growing up, your eyeball is still growing. If your eye is going to see a blurry image, all it can do to try to correct it is grow more. So if you are shortsighted and you don't wear glasses you may be in trouble, because that will make your short-sightedness worse. If your glasses are too strong for you, you will be also in trouble, because if your eyes are still thinking it's not right, they will also keep growing and having the glasses won't make any difference. \nBest is supposed to be that then you wear glasses which are slightly less than what you need, so if your eyeballs are getting a tiny bit longer they will actually be perfect vision and that should inhibit growth. \n\nIf you think you are shortsighted because you have been reading a lot/watching a lot of television/ computer you want to check if that short sightedness goes away if you don't do any of those things for a couple of days. Looking a lot a close things makes it harder for eyes to accommodate, they are doing that much slower. If you have something like this, you could consider getting glasses which are a little bit like the glasses for far sighted people. You only wear those while doing really close up things. That's supposed to prevent eye strain. If you get glasses for short sightedness for this specific condition they won't help you, they probably make things worse. \n\nTake home message: Glasses can be a good thing, but they have to be the correct ones, otherwise they can make things worse. \n\nIf you want to look in more details, funny as it may sound, there have been a lot of studies on chickens on how lenses affects eye sight.
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20/20 vision is what we eye doctors call "normal" vision.  Can you be better than normal?  You bet.\n\n20/20 is good, 20/15 is better, 20/10 is amazing, and 20/08 is really pretty rare, but possible.\n\nWithout getting too scientific, the top number represents the distance (in feet) at which you can see something.  This is always set at 20.  The bottom number represents the distance at which someone with "normal" vision can see it.\n\nIn other words, if you see something at 20 feet, and a "normal" person can see it at 50, then you have worse eyes than normal.  On the other hand, if you can see something at 20 feet, but a "normal" person can see it at 15, then your eyes are better than normal.
29327
When you can't see clearly anymore even with glasses.
105342
Your eye has a converging lens, so if you ever played with magnifing glass you know the effect of such lens. It concentrats all the light in one dot, which is on the back of the retina.
1028607
Squinting serves two purposes: it improves eyesight by defining objects that are out of focus, and it cuts down on brightness from sources of glare, however, squinting halves the normal number of times a person blinks per minute, which could lead to  eye strain, irritation, tearing and an irritating but treatable condition called dry eye.
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When this one blind dude came to our school, someone asked him that question. His answer: "You don't see anything. I know that's hard for a sighted person to imagine. It's kinda like asking what water tastes like."
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Talk to your eye doctor!
873090
they trip! lol. even stevey wonder can see that. lol. i dont know but when you find that answer tell me. iknow how you can find out, just simpely blind your self and try it. hey would it be diferent for somebody who is born blind then somebody who got blind later in life? now your thinking.
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General thought about looking directly at very bright light is correct. The lens of our eyes can project a many fold brighter image on the retina. This can damage the rods and cones in your retina and can even cause permanent damage to your vision.
840486
i have worn glasses since I was in 4th grade and I am now in college....i am just like you...i am nearsited and my eyesite has become worse....i am technically legally blind without  my glasses now...lol....and yes i have become more attracted to guys with glasses after i got them.
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There are several reasons for blurry vision, the most common of which is called refractive error.  The eye is a complex system that takes light and focuses it on special cells in the back of the eye (in the retina).  These cells take the light information and send it back to the brain, which tells you what it is that you're seeing.  \n\nIf your eye focuses light in front of the retina (instead of directly on it), you get blurry vision that's called myopia or nearsightedness.  If your eye focuses light behind the retina, you get blurry vision that's called hyperopia or farsightedness.  It's all related to the optical power and length of the eye.\n\nGlasses and contact lenses work by refocusing light directly onto the retina, giving you clear vision again.  You should also know that there are many eye diseases that can cause blurry vision that is not correctable with glasses or contact lenses.
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You will develope a.n.a.l. glaucoma\nYou will not be able to see S.h.i.t.
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I'm an optometrist, and my first word of advice is to get your eyes checked.  Especially at this time, when you are preparing to drive, make sure that you are seeing as clearly as possible.\n\nIf the ONLY thing going on with your eyes is that you are nearsighted (getting an eye exam is the only way to verify this)....glasses won't make your eyes worse.  You're safe.  The only thing glasses will do is show you detail.  That said, I can pretty much promise that your eyes will get worse for probably the next 5 years, with or without glasses.  The amount of nearsightedness you have is related to the size of your eyeball.  As long as you are growing, your eyes will grow, and you will become more nearsighted.\n\nTo make an analogy (bear with me here), your thumb will continue to grow until your hand is done growing, whether you wear a glove or not.  But if your hand is cold, it's more comfortable to wear a glove.  Likewise with your eyes--they will continue to change whether you wear glasses or not.  It's just going to be more comfortable if you can wear glasses and actually see things.
632495
closing your eyes limits the light that can come through them and refracts the light. if you poke a tiny hole in a piece of paper and look through it, you get the same result. or, just get glasses.
728593
i actually tried that before when i wasnt wearing my contacts....and yes you can see better if you squint really hard...its pretty neat u should try it sometime and see for yourself!
533958
noo loool.. but ur vision can worsen.. to prevent that, every 10 minutes move ur eyes from the screen for about a minute and look at somthg distant.. so ur eye muscles will not get tired.. and u wont go blind lol;)
49655
You will probably not be able to get completely rid of your spectacles, but you can improve your eyesight just by exercising your focus - i.e. focusing on nearby items and far away items often and in succession.