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en.wikipedia.org/wiki/Visual_acuity

Visual acuity (VA) commonly refers to the clarity of vision. Visual acuity is dependent on optical ... Visual acuity is typically measured while fixating, i.e. as a measure of central (or foveal) vision, for the reason that it is highest there. However ...

eyecaretyler.com/resources/how-the-eye-works/what-does-2020-mean

Visual acuity is usually measured with a Snellen chart. Snellen charts display letters of progressively smaller size. "Normal" vision is 20/20. This means that the  ...

www.allaboutvision.com/eye-test

During an eye test, eye doctors use eye charts to measure how well you see in the distance, compared with other human beings. If you haven't established an ...

www.allaboutvision.com/eye-exam/2020-vision.htm

If you have an eye exam and are told you have 20/20 vision, does this mean you ... Visual acuity is measured by your ability to identify letters or numbers on a ...

www.visionaware.org/info/your-eye-condition/eye-health/low-vision/low-vision-terms-and-descriptions/1235

Visual acuity is a number that indicates the sharpness or clarity of vision. A visual acuity measurement of 20/70 means that a person with 20/70 vision who is 20 ...

commonwealtheyes.com/2020-vision-2010-vision-2040-vision-what-do-all-these-numbers-actually-mean

Commonwealth Eye Surgery can perform procedures to get you 20/20 vision. What does ... For example, if you measured the E at 2 inches, you would need to sit ...

www.aao.org/eye-health/tips-prevention/what-does-20-20-vision-mean

Nov 30, 2016 ... A person with 20/20 vision can see what an average individual can see on ... Outside the United States, vision is measured in meters instead of ...

www.todayifoundout.com/index.php/2013/12/2020-vision-scale-works

Dec 31, 2013 ... The vision scale is so prevalent in American culture that there's even a ... So what exactly are eye doctors measuring, and how can the scale be ...

www.vision-training.com/en/Vision%20test/Vision%20measurement.htm

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 20/20 vision.