Visual acuity (VA) commonly refers to the clarity of vision. Visual acuity is
dependent on optical .... Emmetropic subjects with 6/6 vision or "better" (20/15, 20
/10, etc.) ... Measurement...
20/20 vision (or really, 20/20 visual acuity) is considered "normal" vision,
meaning you can read at 20 feet a letter that most human beings should be able
to read ...
"Normal" vision is 20/20. This means that the test subject sees the same line of
letters at 20 feet that a normal person sees at 20 feet. 20/40 vision means that the
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 ...
As a general guideline, if you have 20/20 vision, this means you can see at 20
feet what normal people see at 20 feet. If you have 20/80 vision, this means that ...
So 20/20 is just where someone decided to draw the line as "normal" or good
enough. 20/15 means you can see at 20 feet what a person with 20/20 vision
20/20 vision is referred to as the standard, or how a “normal” person sees. This
means, that when you stand 20 feet away from an eye chart, you see what the ...
Dec 31, 2013 ... If you haven't, you have probably heard other people saying they have "20/20
vision" or even the phrase "hindsight is 20/20." The vision scale ...
By experimentation, Snellen determined the smallest letters a person with "
normal" vision could consistently identify correctly. This became the 20/20 line on
Searching for a free eye chart to test your vision at home? Here you'll ... A 3 to 4-
year-old should be able to read the 20/40 line, and a 5-year-old the 20/30 line.