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Visual acuity


Visual Acuity (VA) commonly refers to the clarity of vision. ... Visual acuity is typically measured while fixating, i.e. as a measure of central (or foveal) vision, for ...

What Does 20/ 20 Vision Mean? - Eye Care...What Does 20/20 Mean?


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 ...

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  ...

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 ...

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 ...

Vision measurement - Vision-training.com

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.

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 ...

A – Visual Acuity | Introduction to Visual Acuity Measurement ...


What are its limitations? Visual acuity describes the acuteness or “sharpness” of vision; that is the ability to perceive small details. The primary measurement tool ...

What does " 20\ 20" Mean? - The Eye Care Institute


20/20 vision is a term used to express normal visual acuity, which is the clarity or how sharp your vision is, measured at a distance of 20 feet. The size of the ...

Popular Q&A
Q: How is "eyesight" measured?
A: Prescriptions are measured using the metric system world wide. The unit used is a diopter. A diopter is 1/meter. For example a lens with a focusing distance of ... Read More »
Source: answers.yahoo.com
Q: How is eyesight measured?
A: In the term "20/20 vision" the numerator refers to the distance in feet from which a person can reliably distinguish a pair of objects. The denominator is the d... Read More »
Source: www.kgbanswers.co.uk
Q: How is eyesight measured?
A: Your prescription is : OD -8.50 - 1.00 X 10 OS -6.00 - 1.00 X 10 OD is Oculus Dexter , latin for Right eye OS is Oculus Sinister , latin for left eye Prescripti... Read More »
Source: ca.answers.yahoo.com
Q: How is eyesight measured.
A: Eyesight is assessed by visual acuity testing. At your eye exam, you will be shown charts of letters or numbers across the (more)? Read More »
Source: www.chacha.com
Q: A question about how eyesight is measured?
A: Visual acuity (20/something) tells you how well (or poorly) you see. If you see poorly, an optical prescription (-2.50, etc) describes what is required from you... Read More »
Source: answers.yahoo.com