Measure the green
"standardization bar" in centimeters on the computer
monitor. Then stand in a position back from computer
monitor so that your eye is this same number of feet
from the screen. i.e. if the green bar measures 10
centimeters in length, you should stand back so that
your eye is 10 feet from the screen.
Vision testing should be performed on each eye
separately, wearing distance eyeglasses if required.
There are six lines on the screen, you should note
the last line number in which you can read more than
half of the letters.
The middle letter of the top line is equivalent to
6/60. The "T" and the "B" on the top line are
equivalent to 6/36. The second line is 6/18. The
third line is equivalent to 6/12. The bottom three
lines represent 6/9, 6/6 and 6/5. These are
considered to be "normal vision" with the 6/6 line
being the traditional normal vision line. If you are
able to read the last line it means that you are
standing too close to the monitor.
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. For final assessment consult your eye
Sanjay Dhawan, New Delhi, India. Last updated on 31 May 2011
Dr. Sanjay Dhawan, MBBS, MS (Gold
Medalist), DO - Additional Director & Head of Department - Ophthalmology. Phone: +91-9810009144 Appointment by phone: +91-9540009144/+91-9910009144OR call Helpline (+91) 9910009144 for
any assistance. Appointment by E-mail: email@example.com
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