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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) vi...

What Does 20/20 Mean? - EyeCare Associates of East Texas


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

Low Vision and Legal Blindness Terms and Descriptions ...


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 ...

Vision measurement - Vision Training

www.vision-training.com/en/Vision test/Vision measurement.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.

Low Vision Resources Center — How Visual Acuity Is Measured


Oct 6, 2003 ... by Wendy Strouse Watt, O.D.. October 2003. This information is also available as part of an audiovisual presentation, “All About Eyeglasses”.

How the 20/20 Vision Scale Works - Gizmodo


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 ...

How to Measure Your Vision at Home: 9 Steps (with Pictures)


How to Measure Your Vision at Home. As you have probably noticed during your visits to the eye doctor one of the first tests he makes you take is reading the ...

Vision tests - Vision Australia


Visual acuity tests. Visual acuity tests measure the ability to see fine detail. ... It uses capital letters of different sizes to test vision in literate adults. The test is ...

Visual acuity and 6/6 vision (20/20 vision) - BootsWebMD


Visual acuity is a measure of your central vision, the ability to distinguish details and shapes of objects.

eye - What are the different eyesight measures and how are they ...


May 13, 2015 ... While searching about laser surgery for my myopia, I came across different system to measure the quality of individuals' eye sight.

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Eye Test - The Eye Chart and 20/20 Vision Explained


During an eye test, eye doctors use eye charts to measure how well you see in the distance, compared with other human beings. The classic example of an eye  ...

How the 20/20 Vision Scale Works - Today I Found Out


Dec 31, 2013 ... So what exactly are eye doctors measuring, and how can the scale be ... So, if you take someone with 20/20 vision and put them 200 feet away ...

Visual Acuity: What is 20/20 Vision?


20/20 vision is a term used to express normal visual acuity (the clarity or sharpness of vision) measured at a distance of 20 feet. If you have 20/20 vision, you can ...