Vision test
ON-LINE VISION TEST
It
is possible to have a serious vision problem and not know it.
Vision
problems that are left undetected and untreated may lead to vision loss and in
some cases blindness. Early detection is the key to minimizing vision loss.
You should
stand in a position back from your computer screen so that your eye is about 8
feet from the screen. You should also set your screen in mode full
screen and 800 x 600 resolution.
Vision testing
should be performed on each eye separately, wearing distance eyeglasses if
required. There are ten lines on the screen, you should note the last line
number in which you can read most (50-75%) of the letters.
The second line
is equivalent to 20/200. A person unable to read any letter on this line with
best eyeglass correction is considered legally blind.
The third line
are equivalent to 20/100. The sixth line is 20/50. Best corrected acuity in the
range between 20/50 and 20/100 is considered disabling in occupations which
require work with numbers or extensive reading.
The seventh
line is equivalent to 20/40, it is the "driver's test" line. You must
be able to read most of the letters on this line in order to obtain an
unrestricted drivers license in most states including Massachusetts.
The bottom
three lines represent 20/30, 20/25 and 20/20. These are considered to be
"normal vision" with the 20/20 line being the traditional normal
vision line. It is generally felt that the maximum visual acuity of the eye is
around 20/15 or 20/16.
This vision
test can only be considered a screening test. A variety of factors such as
lighting, glare, monitor quality may have an effect on the results of this test.
| E C |
|
20/400
|
| L H 4 |
|
20/200
|
| E S 8 F J |
|
20/100
|
| X M 4 A Q |
|
20/80
|
| 9 L V W P |
|
20/60
|
| M Z 7 C B |
|
20/50
|
| N A 4 X R |
|
20/40
|
| H Y O T 9 |
|
20/30
|
| P H N W X V |
|
20/25
|
| G 8 F S Q P |
|
20/20
|
>>>Vision test for
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