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,
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 ...
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
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 ...
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 ...
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.
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. As you have probably noticed during your
visits to the eye doctor one of the first tests he makes you take is reading the ...
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 ...
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 ...