Snellen Test Chart With Instructions (Page 2 of 2) in pdf

Snellen Test Chart With Instructions Page 2

Snellen Test

1. Print the test page in A4 standard format. Place yourself 2.8

meters (or 9 feet) away from the chart. If the test page is in

another format, or if you wish to perform the test facing the

screen, you will have to calculate the distance at which you

must stand facing it, using the following formula: measure the

height of the letter E (first line, 20/200) in millimeters. Then,

divide the value of this measurement by 88. Finally, multiply it

by 6. The result shows the distance at which you must be

placed, in meters.

E.g. (42/88) x 6 = 2.8 m

2. Test your visual acuity with correction (contact lenses or

glasses).

3. Test one eye at a time. Start with the right eye, covering the

left one without pressing on it. Then, examine the left eye by

doing the opposite. If you are using correction glasses, you

can cover the eye with a sheet of paper.

4. Read the letters from the largest to the smallest.

5. To make the examination easier and faster, another person

can help you by showing the letters you must read among the

lines of letters.

6. If you can read the letters of the 8

line, your sight is optimal

(visual acuity 20/20).

7. If your visual acuity is less than 20/20 or if you have doubts

about your sight, visit your ophthalmologist.

NOTE: take the results as a recommendation. The results do not

indicate a diagnosis whatsoever. Performing the test does not

mean you should skip regular visits to your eye doctor,

because you could easily miss signs that only a trained eye

care practitioner would find.

Snellen Test Chart With Instructions Page 2