Visual acuity - Wikipedia, the free encyclopedia In the term "20/20vision" the numerator refers to the distance in feet from ... 20/20vision can be considered nominal performance for human distancevision; 20 ...
http://en.wikipedia.org/wiki/Visual_acuity
2020vision and visual acuity Home > What is 20/20VisionVision & Visual acuity. Visual acuity is a measure of the ... At a 20 foot distance, (the top number in the fraction, or testing ...
visual acuity: Definition from Answers.com visual acuity n. Sharpness of vision, especially as tested with a Snellen chart. Normal ... In the term "20/20vision" the numerator refers to the distance in feet from which a ...
http://www.answers.com/topic/visual-acuity
The Meaning of 20-20Vision from Vision World Wide, Inc. If you have 20/20vision, you can see clearly at 20 feet what should normally be seen at that distance. ... It only indicates the sharpness or clarity of vision at a distance. ...
Visual Acuity: What is 20/20Vision? ... to express normal visual acuity (the clarity or sharpness of vision) measured at a distance of 20 feet. If you have 20/20vision, you can see clearly ...
http://www.aoa.org/x4695.xml
20/20Vision Children who struggle to read and remain on task may have an undiagnosed vision problem. Also, information on correcting lazy, crossed, and wandering eyes.
http://www.childrensvision.com/learning.htm
About 20/20Vision | eHow.com About 20/20Vision. 20/20 is a familiar term used in reference to the quality of vision. It is actually a fraction that corresponds to the minimum distance one must ...
http://www.ehow.com/about_4569441_vision.html
How is vision measured? The 20/20 label is a relative measurement of how well you see. If you can see a 9 mm letter at a distance of 6 meters (20 feet) then you have 20/20vision. ...