Snellen Chart

In order for a certain degree of test accuracy it is important to follow this proceedure:

Letter height and distance in reality:

• Letter A: 88mm in height
• Standing Distance from Image: 6 meters

To work out the distance you are required to stand back from your monitor you will need to follow the steps below:

        1. Measure the height of letter A, on your monitor, in millimetres and divide by 88.
        2. Take the value from step 1 and multiply by 6.
        3. The value from step 2 is the distance you need to stand from your monitor in metres.

-- Click here to view Snellen chart --

All information is for reference purposes only; if you have any concerns we recommend that you visit a qualified optician.

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