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Visual acuity - Wikipedia, the free encyclopedia
In the term "20/20 vision" the numerator refers to the distance in feet from ... half that acuity for distance vision and 20/10 vision would be twice normal acuity. ...
http://en.wikipedia.org/wiki/20/20_vision
The Eye Chart and 20/20 Vision - AllAboutVision.com
... visual acuity; here's a sample eye chart and explanation of 20/20 vision. ... your best distance vision with eyeglasses or contact lenses) is 20/200 or worse. ...
http://www.allaboutvision.com/eye-test/
2020 vision and visual acuity
Normal vision and visual acuity and meaning of 2020 vision ... distance), a person with normal vision should be able to read the small 20/20 ...
http://www.agingeye.net/visionbasics/healthyvision.php
What is 20/20 Vision?
An explanation of the meaning of 20/20 vision. ... 20/20 vision means that at a distance of 20 feet, you should be able to read the ...
http://eyedoctor.homestead.com/20vision.html
Visual Acuity: What is 20/20 Vision?
... acuity (the clarity or sharpness of vision) measured at a distance of 20 feet. ... 20/20 vision only indicates the sharpness or clarity of vision at a distance. ...
http://www.aoa.org/Visual-Acuity.xml
The Meaning of 20-20 Vision from Vision World Wide, Inc.
... acuity (the clarity or sharpness of vision) measured at a distance of 20 feet. ... Clarity of vision does vary with distance. ...
http://www.visionww.org/article-what-is-20-20-vision.htm
visual acuity: Definition from Answers.com
visual acuity n. Sharpness of vision, especially as tested with a Snellen chart. ... In the term "20/20 vision" the numerator refers to the distance in feet from ...
http://www.answers.com/topic/visual-acuity
20/20 Vision: 20/20 doesn't mean perfect
... a measure of the clarity or sharpness of your vision at a distance of 20 feet. ... If, on the other hand, you have 20/10 vision, you have sharp eyes! ...
http://www.lascolinasvision.com/pages/patient_library/2020vision.htm
Encyclopedia - Visual Acuity
A reading of 20/20 is normal vision, meaning that the smallest symbol that can ... read at a distance of 20 feet what a person with normal vision reads at 40 feet. ...
http://www.visionrx.com/library/enc/enc_acuity.asp
About 20/20 Vision | eHow.com
About 20/20 Vision. 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