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 ...
20/20 is average vision the chart was developed by Snellen. Its the size of a letter
that was ... 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 ...
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 ...
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.
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 ...
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 ...