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Curious. Is there such a thing as better than 20/20 vision? If not, what do they mean? Do they give them some kind of new-age telescopic vision? X-Ray vision? A third eye, allowing 20/20/20 vision?
It is possible to have better than 20/20 vision (naturally and with corrective lenses). It would involve the latter number being less than 20 (20/15, for instance). It just means you have even better eyesight than normal.
"20/20", from what I've heard, is not some perfect vision that cannot be surpassed; it's just what's normal for human vision. Many animals, for instance, have far superior vision.
Yeah, 20/20 is just normal. This means you can sit 20 feet away from an eye chart and see what a normal human would see.
so at 20/17 you can stand 20 feet from the chart, and see what a normal person sees at 17 feet from the chart.
It is very crude.
Why don't they have laser surgery set to 20/15 instead of set to 20/20, then? :confused:
Cause 20/20 is a safer bet. if your eye hardware is good you are about garenteed 20/20. The rest actually has to do with the innards of your brain, from what I understand. Vision is 90% eyes, 10% processed by brain. your eyes actually see images upside down, your brain flips them. etc etc.
Probably because the more the change, the more dangerous the surgery, especially if it goes beyond what's "normal" for our eyes. Normal is normal for a reason - because it's the natural fit of the rods and such in our eyes.Quote:
Originally Posted by Loony BoB
I never knew what 20/20 vision was until this thread. Last time I went to the opticians, I just got told that my long sightedness (new word) was fantastic :D :D :D
If the surgery makes you see better do you think someone with 20/20 vision could get operated on and get better vision??
Smile and Be happy :love:
I imagine part of it has to do with the "potential" of the eye. It's probably hard to get some people to 20/20 vision, while others can improve beyond that, like 25/20, with very little danger.
My dad has weird vision. He's blind in one eye from untreated lazy eye, but his other eye is better than 20 because it has to overcompensate.
Last time I did that chart thing where you cover an eye or whatever they said afterwards to my mom I had 20/15 eye vision, which is apparently better. I guess theres numbers at the end of the chart that say "20/20" and if you can read that line you have 20/20, etc.
Ah, that's how it works. Despite having abysmal vision since I was young, I never got around to learning just how the number system works.[q=Khaotic]I guess theres numbers at the end of the chart that say "20/20" and if you can read that line you have 20/20, etc.[/q]See bipper's post.Quote:
Originally Posted by bipper
yeah the vision number thing is funky...when i was a kid i thought each 20 meant the vision level of either eye, but then i wondered which was which.....so i looked it up.
apparently i have 'perfect' 20/20 which actually means average.
i first heard this from an acuvue advantax commercial. it was saying that 20/20 was the norm but that these lenses could up you to 20/15 because the lens was carved like a magnifier
20/20 vision is over rated nuff said.
Raistlin has the most superior vision of all.Quote:
Originally Posted by Raistlin
That sounds to me as if you would have to sacrifice some of the 'side vision' to get better focus straight ahead.Quote:
Originally Posted by Namelessfengir
that commercial was from at least ten years ago how sad is it that i can call up the commercials the well
No way, he's totally blind. :p But my vision is even worse than his, and I'm 3 years younger.Quote:
Originally Posted by *~Dagger Trepe~*Raistlin has the most superior vision of all.Quote:
Originally Posted by Raistlin
You're 93? :confused:Quote:
Originally Posted by Rye
Yeah, i dont trust laser surgery for long term vision:(Quote:
Originally Posted by Shattered Dreamer
Raist is 100, Rye would be 97.Quote:
Originally Posted by Flying MulletYou're 93? :confused:Quote:
Originally Posted by Rye
Death vision, obviously :rolleyes2Quote:
Originally Posted by Loony BoB
I didnt know what 20/20 meant until now
Sad, I have like 20/five billion vision. Can`t see anything without my contacts ^^
When I first got glasses back when I was 7, I was told that with them I'd have 20/10 vision. Then again, as a child, my vision was much better then than it is now... at this point, I don't even think I have 20/20 WITH glasses....and without glasses I have to be at least a foot away from something to read it.
My vision sucks.
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Originally Posted by Jojee
I just wonder why most commercials give out 20/20 instead of 20/15?
Quote:
Originally Posted by Omega Cloud
Quote:
Originally Posted by Raistlin
Actually, I lied. My vision is perfect when I look through my Ritascope. AHAHAHAHA.
The average strength of the eye is already around 20/15, but the "better" your vision is the worse your short-distance vision is. For that reason, they won't laser your eyes past 20/20, since that is strong enough to function without trouble in nearly everything.
Also, don't believe any advertisement that claims to have a success rate of whatever%, because that actually refers to the percentage of patients that achieve 20/40 vision post-operation. It's pretty much a lie. :p
They said 20/20 or better, I guess that's just a phrase to encourage new customers to get it, thinking the treatment would be godspeed.
I have 20/50 vision in my right eye and 20/10 in my left. It's actually kind of cool because it gives me a reason to want a monocle.