How To Use This Test
Get a ruler that shows centimeters. The blue standardization bar must be measured in centimeters on your computer screen or printout. You should then stand in a position back from your computer screen so that your eye is this same number of feet from the screen. i.e. if the blue line measures 9 1/2 centimeters in length, you should stand back so that your eye is 9 1/2 feet from the screen. If you don't have a ruler that measures in centimeters, measure the blue line in inches and multiply the number of inches times 2.54.
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 most (50_75%) of the letters.
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