pottymouth wrote:
Waht, like 21/20?
Either you now have X-Ray vision and the ability to melt rocks with a glance, or you're a ******* ****.
[link=http://tjsamson.client.web-health.com/web-health/topics/GeneralHealth/generalhealthsub/generalhealth/eye/eye_exam.html wrote:
Source[/link]]What does 20/20 mean?
A person whose vision is 20/20 can see from 20 feet what the average person can see from 20 feet.
*
The numerator (the upper number) represents how far away the person being tested would be.
o
(This number is normally twenty, since the test is usually conducted with the subject located 20 feet from the eye chart.)
o
(The size of the letters on the eye chart is also consistent; their standard measurement is approximately half an inch high.)
*
The denominator (the lower number) indicates from how far off the average person could see just as clearly.
For example, if someone must be within 20 feet of the chart to read what a person with normal vision could make out from 80 feet away, then the patient�s vision would be designated as 20/80.
(Since some individuals have better-than-average vision, it is also possible to have a larger numerator, for instance 30/20 vision, which would mean that the from 30 feet off the person could see just as well as people with normal vision see from 20 feet.)
Better than 20/20 vision means exactly that. His vision is better than that of the average shmoe. 20/15 vision here last time I had it checked (It's been a few). What I see at 20 ft, you have to scoot up to 15 feet to read.
Edited, Sun Apr 30 12:33:33 2006 by Mossholder