We’ve made a simple and indicative vision test to help you find the strength you need when buying reading glasses. You should sit 40 cm away from the computer screen - it's closer than you think.

Read the sentences below. When you reach the smallest sentence you can read quite clearly, the corresponding right column suggests what strength you need.

If you are in doubt between two different strengths you should choose the lowest one.

Sentence Strength Age*

If you can read this sentence clearly, you don't need reading glasses

0 <35 years*

If you can read this sentence clearly, you don’t need reading glasses

+1.0 35-45 years*

If this is the first line you can read pretty clearly, use this strength

+1.5 45-50 years*

If this is the first line you can read pretty clearly, use this strength

+2.0 50-55 years*

If this is the first line you can read pretty clearly, use this strength

+2.5 55-60 years*

If this is the first line you can read pretty clearly, use this strength

+3.0 60-65 years*

If this is the first line you can read pretty clearly, use this strength

+3.5 +65 years*

*General age-related far-sightedness is identical and follows almost all the patterns summarised above.