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A person with 20/20 vision can read an eye chart at a distance of 20 feet. A person with 20/40 vision can't and has to get closer to the eye chart. A person with 20/20 vision can read at 40 feet what a person with 20/40 vision
AnswerIf 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.
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∙ 12y ago
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What does 20 20 vision mean?
It means seeing at 20 feet what a person with normal vision sees at 20 feet. A person who has 20/40 vision can see at 20 feet what the person with normal vision sees at 40 feet, etc. Some people have better than 20/20 vision.
Is a vision of 4040 good?
There is no vision score of 40/40. Vision is scored on the distance a person can see in feet. A vision score of 20/20 would be considered perfect sight.
What does -20 mean?
Do You mean 20-20 vision?
What does 20 mean?
Do You mean 20-20 vision?
WHAT DOES 20' MEAN?
Do You mean 20-20 vision?
What does 20-20 mean?
Do You mean 20-20 vision?
20 20 stands for what?
Do you mean for eyesight?20-20 vision is average vision of human what he can see normally from 20 feet away as a standard.If 20-40 vision, that means you have to stand 20 feet away from an object that the average person can distinguish from 40 feet away.If 20-15, that means you can stand 20 feet away from an object that the average person can distinguish from 15 feet away.
How bad is 20-300 vision?
I am pretty sure that is very bad for u, I have 20-40 vision
How bad is 20 300 vision?
I am pretty sure that is very bad for u, I have 20-40 vision
Why is perfect vision called 20 20?
Technically, it is NOT considered perfect vision. 20/20 is considered nominal vision and is a value that represents an accepted level of visual acuity for a human. It means that at 20 feet, you can see things the average person will see at that distance. Good vision would mean the the bottom number is smaller, you can see at 20 feet what most people can see at 15 or 10. 20/40 would mean that you have to be at 20 feet to see what a normal person sees at 40 feet. Most places define blindness as 20/200.
What was Adam smiths vision?
About 20/40 I think.
What does it mean if you have 50 20 vision?
Your vision at 20ft is my vision at 50ft.
