Online eye test
First adjust the card on the screen so the size is real. Then stand at the distance shown, cover one eye and say which way the legs of the E point. The E gets smaller until you make a mistake.
How to useWhich way is the E pointing?
1. Hold a credit or bank card against the screen, over the drawing, and adjust until it is the same size.
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Online eye test: what it is for
The test uses the letter E pointing up, down, left or right, like the Snellen charts at the eye doctor. Before starting, you hold a card against the screen to calibrate the real size, and the E is drawn at the right size for the distance you choose.
On each line the E gets smaller, and you need 2 out of 3 right to move on. The result shows your acuity in 20/20 and decimal notation for the right eye, the left eye or both. It is a screening and does not replace a visit to the eye doctor.
How to use
- Adjust the card drawing until it matches a real card.
- Choose the distance and the eye, cover the other eye and start.
- Say which way the E points until you miss and see your acuity.
When to use it
- Notice whether your vision got worse and whether to book an appointment.
- Compare the vision of your right and left eye.
- Do a home screening for children and older people.
Frequently asked questions
Does the test replace a visit to the eye doctor?
No. It is a rough home screening: the screen, the room lighting and the distance change the result. It helps you notice whether it is worth booking an appointment, but it does not measure your prescription or detect eye diseases.
What does 20/20 or 1.0 mean?
It is the vision considered normal: seeing at 20 feet (6 meters) what a person with normal vision sees at that distance. 20/40 (0.5) means you need to be at 20 feet to see what normal vision sees at 40 feet.
Is it really free?
Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 are free.