Online Eye Test
A quick at-home vision screening. Calibrate your screen with a real card, sit at the asked distance, then read each line of the Snellen-style chart and type the letters. A rough check of your eyesight — not a medical diagnosis.
Step 1: Calibrate your screen
Match the blue rectangle below to a real bank/credit card (move the slider). This is needed so the letters show at the correct size.
Step 2: Start the test
Result
How to use
- Use the slider to match the blue rectangle to a real card (calibration).
- Select the eye and distance, then press "Start Test".
- Read and type the letters on each line — the test stops and gives your score when you get a line wrong.
Tips
- Calibrate with a real card first — every result depends on that step.
- Sit at the distance the test asks for; moving closer invalidates the score.
- Test each eye separately and compare the two results.
- This is a rough screening, not a diagnosis — see an eye doctor if you struggle.
Frequently Asked Questions (FAQ)
How does the online eye test work?
Calibrate your screen with a real card first, then read each line of the Snellen-style chart and type the letters, one eye at a time. The test stops when you get a line wrong and gives your score.
Why must I calibrate with a real card?
Calibration matches the on-screen rectangle to a real card so the letters show at the correct size. Every result depends on that step.
How far should I sit from the screen?
Sit at the distance the test asks for, between 1 and 3 meters. Moving closer invalidates the score.
Is this a real medical eye exam?
No. It is for general guidance only. If you notice a problem with your vision, get a checkup from an eye specialist.