what is 30/30 vision?
602746
It doesn't exist, vision is based on a 20 foot system, so 20/20 is the best. 30/20 would be vision in which a person sees something clearly at 20 feet that a person with 20/20 vision could see at 30 feet.
662073
30 divided by 1/2 is the same thing as 30 times 2 = 60\n60 plus 10 is 70.
336491
Vision: what you see your department to be in the future. e.g. to establish being the benchmark of all finance and accounting standards in the whole indusrty of (what industry are you?)\nvision is long term while goal is short term\n\nGoal: what you want to achieve in the future\ne.g. - to be fully computerized by the end of the year.\n\nyou may only have one vision, but you can have lots of goals. \n\nyes you are right, it has to be simple.
147056
It depends because the length of the patient's eye and the distance of the object also play a role in the power needed.  MOST eyes need a total power of approximately 60 diopters, but this is a highly variable number.
9321
The standard eye chart is called the Snellen Chart, after the Dutch ophthalmologist Herman Snellen (1834-1908). Snellen developed the chart in 1862; it measures visual acuity, or the ability to see from a fixed distance. \nWhy the big "E?" That's how Snellen designed the original, and having a standard letter on top helps to determine the chart's size and the distance it should be from the patient. However, we found several variations of the Snellen chart: the letter "A" on top, "K V D" on top, as well as the letter "F." \n\nThe size of the letters relative to each other is very important. Snellen letters, also known as optotypes, grow progressively smaller according to a constant ratio. The eighth row of letters is usually the 20/20 line. Someone with 20/20 vision has "normal" vision (though 61% of Americans wear corrective lenses), while someone with 20/40 vision can only see at twenty feet what a normal person can see from forty feet. \n\nSome charts use a series of "Es" facing different directions; the objective is to identify the directions of the letters. This is a popular test for children or people who can't read.
933597
Wearing contact helps - coz ur center does not change - and has more sharp / focus than glasses.\nIf u follow eye related healthy diet/exercise - u can get by with a smaller no, like  -1.75 for starter, and help it reduce further (coz ur eye will not suffer strain from change of optical centers, etc - as is with glasses...\nTheoretically, one cannot go beyond 20/20, it is perfect vision...
1065929
30% = .3\n2711 X .3 = 813.3\n20% = .2\n2711 X .2 = 542.2
94315
To Improve Peoples Eye Vision
553936
An average is between 20% - 30%...
379741
It happens very fast.  Most people see at20/20 almost immediately but some it takes longer.  It can take up to a year for your eyes to adjust and most people have at least some fluctuations in that year.  But most people have nearly perfect vision right away.
896614
I have the same problem, I just found out I need glasses for it, but also for distance and stigmatism.  Nice combo, basically I need bifocals at the age of 25. :(  But the doc did say the computer is bad for the eyes, so every 20 minutes, you should look 20 feet away and look at that place for 20 seconds. 20/20/20.  It is supposed to help your eyes refresh.  Sleeping a full night helps too, don't forget to blink, use drops if needed.  The problem with computer screens is that each tiny pixel in the screen is moving on its own, almost flickering.  We can't see it because the flicker and pixels are so so small, but the eye needs to use more energy to focus on that screen, thus damaging your eye sight.  Get glasses, computer glasses, they are supposed to help, I am waiting to buy mine because I don't have eye insurance in 2006, but will sign up for it in 2007.
779969
20/20 means the person can read the letters on the eye chart at 20 feet when a majority of people can read it at 20 feet.  20/5 means the majority of people can read the chart at 5 feet but this person can read it at 20 feet--which is exceptional.  i have heard of people with 20/10 which is considered above average but i have never heard of someone with 20/5 vision.  i guess they could be out there but they are very, very rare.
129345
i think it is 30 feet
609119
The image is focused in front of retina, and you are near-sighted (MYOPIA).
967986
http://www.highlanderfilm.com/Principles%20Behind%20Lenses%20and%20Visual%20Optics.htm
604007
http://en.wikipedia.org/wiki/Eyesight
535480
30: 3*2*5\n21: 7*3\n\nThe End