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Health Forum    Optical
Health Discussion Forum

 Im going to the eye doctor ?
Tomorrow at 5. I had my eyes checked aobut 3 years ago. i was given glasses but my eyes wernt to bad so i didnt wear them. now my eyes are worse.
Im going to the eye doctor in walmart.

 I got shampoo in my eye what should I do?

 Why do your eyes hurt after you cry?

 Do you find that your contacts start to irritate you at the end of the day?
Or is that just my wierdness?!
Additional Details
Oh you're all really funny...I meant my actual contacts that I put in my eye....hence it's in optical. Ha flippin Ha!! :P...

 Why do my eyes change from brown to green when I am drunk?

 Is it dangerous to swallow a contact lense? HELPPPP!?
I have disposable contact lenses and accidentally swallowed a half of one. Is that dangerous? Please help meee!...

 what causes your eye to twitch?
cos mine is going fricken crazy and twitching so much my eyeball is being twitched by the crazy twitching eyelid! It's been going wild for about an hour!
how can. I stop it and why does ...

 An eye problem, does it sound serious?
My dad is 47 and he has a lot of throat pain. Now his eye is really hurting him too for a couple of weeks now. Both eyes are very yellow. Now he has a "growth" that was tiny and has ...

 Is There Such A Thing As Rainbow Contacts?
I want to know if they exist and where I can get some if they do exist(with a prescription). And if you find any websites direct link please!

P.S. Don't say it's stupid or weird, ...

 What do contacts feel like when they're in your eyes?
are you aware of them or can you not feel them at all? And does it feel weird once you put it in the first time? Are you supposed to get used to it before it feels comfortable? thanks....

 Why won't my contact lenses go in my eyes?
I don't even blink but it never goes in :( So frustrating....

 My eye has been itchy and hurting me all day, could it be pink eye?
My eye isn't really red, but its been bothering me all day. It does feel like a little bit of liquid is coming out of it....

 Why do they blow stuff into your eyes when you have an eye test?
i went for my first ever eye test two days ago and something is bothering me, in the test they blew a puff of air or i don't know exactly what it was before i had a test with diffrent lenses, is ...

 I smoke weed and my eyes turn blue? I keep using visine....but it wont stop? Any help or advice would be great?

 Can you wear monthly disposable contacts for over a month (say two months)?
IS it bad for your eye if I do? Or can I really wear them for as long as they'll last?
Additional Details
will eventually if I wear monthly disposable contacts for like two months, ...

 How bad does your eyesight have to be to get contacts?
I'm sick of wearing glasses and I got curious :P...

 What can i eat to improve my eyesight?
I have a maths test tomorrow and i sit at the back of the class and i see the work on the board but i can make out what its saying its like everything is blurred/faded

i really need to knw ...

 Which color contacts? Freshlook Contacts question!?
ok i want to get some colored contacts for fun
the freshlook colorblends or just the freshlook color ones. i was thinking of the violet or grey. but i have dark brown eyes so i dont know if it�...

 Does this girl have a lazy eye?

Is that a lazy eye?...

 My 12 year old son would like a pair colored halloween contacts are they safe?
my son would like a pair of colored Halloween contacts to wear just for fun. he does not need prescription lenses. have there been any problems and how long do they last?...

what is 20/20 vision?.?.?.?.?

someone who has clear and perfect vision in both eyes

when you can see 20 things on the left and 20 on the right

you have perfect vision, you can see well far and near (:

Alex G
you got perfect eye vision

Milan S
perfect vision

Shellly P
you have really good vision,
think of it like a test, 20/20 = 100% :D

you can see 20ft perfectly

higher the # means you have less than good vision, and the lower the # the better.

average vision that you see without having glasses or contacts

Judy B
It means you can see the "20" size letters when standing 20 ft away from the eye chart.

This is the average vision that a eye without disease or damage can see. Some such eyes can see a little better, some a little worse, so 20/20 is average.

it means you see perfectly without contacts or glasses

Clear eyesight. No need for glasses.

the best kind of vision

California Gurl! :)
perfect vision

The Mrs.
20/20 to be more specific is:

"Visual acuity (VA) is acuteness or clearness of vision, especially form vision, which is dependent on the sharpness of the retinal focus within the eye and the sensitivity of the interpretative faculty of the brain.[1]

VA is a quantitative measure of the ability to identify black symbols on a white background at a standardized distance as the size of the symbols is varied. It is the most common clinical measurement of visual function. In the term "20/20 vision" the numerator refers to the distance in feet from which a person can reliably distinguish a pair of objects. The denominator is the distance from which a person with standard VA would be able to distinguish them—the distance at which their separation angle is 1 arc minute. The metric equivalent is 6/6 vision where the distance is 6 meters. Twenty feet is essentially infinity from an optical perspective (the difference in optical power required to focus at 20 feet versus infinity is only 0.164 diopters). For that reason, 20/20 vision can be considered nominal performance for human distance vision; 20/40 vision can be considered half that acuity for distance vision and 20/10 vision would be twice normal acuity. The 20/x number does not directly relate to the eyeglass prescription required to correct vision; rather an eye exam seeks to find the prescription that will provide 20/20 vision."

it means you have perfect vision in both eyes, both of your eyes are focused the exact same :-)

it is perfect vision. it means that you see objects clearly at a distance of 20 feet that a normal person sees at a distance of 20 feet.

[email protected]
By looking at lots of people, eye doctors have decided what a "normal" human being should be able to see when standing 20 feet away from an eye chart. If you have 20/20 vision, it means that when you stand 20 feet away from the chart you can see what the "normal" human being can see. (In metric, the standard is 6 meters and it's called 6/6 vision). In other words, your vision is "normal" -- most people can see what you see at 20 feet. (From here on, please assume that the word "normal" has quotes around it).

If you have 20/40 vision, it means that when you stand 20 feet away from the chart you can see what a normal human can see when standing 40 feet from the chart. That is, if there is a normal person standing 40 feet away from the chart and you are standing only 20 feet away from it, you and the normal person can see the same detail. 20/100 means that when you stand 20 feet from the chart you can see what a normal person standing 100 feet away can see. 20/200 is the cutoff for legal blindness in the United States.
You can also have vision that is better than the norm. A person with 20/10 vision can see at 20 feet what a normal person can see when standing 10 feet away from the chart.

Sorry if this is long, but I'm going to elaborate a little more on this question. Most people know the term "20/20 vision" but may not have a clue as to what it exactly means. So here it goes....bare with me, lol:

20/20 is a term used to express normal visual acuity (shapness of vision) measured at a distance of 20 feet. If you have 20/20 vision, you can see clearly at 20 feet what should normally be seen at that distance. If you have 20/100 vision, it means that you must be as close as 20 feet to see what a person with normal vision can see at 100 feet away. 20/20 vision does not mean "perfect" vision. It only indicates the clarity of vision at a distance. There are many other important factors that contribute to your overall vision ability: peripheral vision, depth perception, color vision, eye coordination, focusing ability, etc...

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