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Eye charts
Using a Snellen eye chart. The chart is usually read while standing at a distance of 20 feet. Acuity is represented as a fraction, with the distance at which you are ...
| http://www.i-see.org/eyecharts.html |

What does 20/20 vision really mean? Different eye charts and tests can be used to determine your visual acuity.
| http://www.allaboutvision.com/eye-test |

The largest letter on an eye chart often represents an acuity of 20/200 (6/60), the ...
| http://en.wikipedia.org/wiki/Snellen_chart |

Bioastronautics: Lesson 6, 20/20 vision Activity – Eye chart. 1. 20/20 vision Activity – Eye chart. Using a Snellen Eye chart. The chart is usually read while ...
| http://www.teachengineering.org/col...man_lesson06_activity1_eyechart.pdf |

A Snellen eye chart is used to determine how "normal" your vision is. It sets a standard for what most people should be able to see when they stand 20 feet away ...
| http://www.hometrainingtools.com/eye-chart-science-project/a/1254 |

By looking at lots of people, eye doctors have decided what a "normal" human being should be able to see when standing 20 feet away from an eye chart.
| http://health.howstuffworks.com/human-body/systems/eye/question126.htm |

Oct 30, 2007 ... Printable Snellen eye chart you can download and print for home use to determine your visual acuity ie. 20/20 vision. If a person cannot ...
| http://www.disabled-world.com/artman/publish/eye-chart.shtml |
20 20 vision chart Top 10 from Google
| Eye Charts |
| Using a Snellen eye chart. The chart is usually read while standing at a distance of 20 feet. Acuity is represented as a fraction, with the distance at which you are ... |
| http://www.i-see.org/eyecharts.html |
| The Eye Chart and 20/20 Vision - AllAboutVision.com |
| What does 20/20 vision really mean? Different eye charts and tests can be used to determine your visual acuity. |
| http://www.allaboutvision.com/eye-test |
| Snellen chart - Wikipedia, the free encyclopedia |
| The largest letter on an eye chart often represents an acuity of 20/200 (6/60), the ... |
| http://en.wikipedia.org/wiki/Snellen_chart |
| 20/20 Vision Activity – Eye Chart |
| Bioastronautics: Lesson 6, 20/20 Vision Activity – Eye Chart. 1. 20/20 Vision Activity – Eye Chart. Using a Snellen Eye Chart. The chart is usually read while ... |
| http://www.teachengineering.org/collection/cub_/activities/cub_human/cub_human_l... |
| Eye Chart Vision Test Project |
| A Snellen eye chart is used to determine how "normal" your vision is. It sets a standard for what most people should be able to see when they stand 20 feet away ... |
| http://www.hometrainingtools.com/eye-chart-science-project/a/1254 |
| What does it mean when someone has 20/20 vision - Health |
| By looking at lots of people, eye doctors have decided what a "normal" human being should be able to see when standing 20 feet away from an eye chart. |
| http://health.howstuffworks.com/human-body/systems/eye/question126.htm |
| Printable Snellen Eye Chart |
| Oct 30, 2007 ... Printable Snellen eye chart you can download and print for home use to determine your visual acuity ie. 20/20 vision. If a person cannot ... |
| http://www.disabled-world.com/artman/publish/eye-chart.shtml |
