Eye Screening
Free Online Eye Test
Screen-Calibrated Visual Acuity Screening
Physically accurate Snellen chart test. Calibrate your screen with a credit card, then check both eyes in under 5 minutes.
Age 18+16 Questions1 Attempt / EyeCalibrated Sizing
- Screen is physically calibrated before the test using a credit/debit card.
- Letters are sized in real millimetres based on your screen's pixel density.
- Right eye tested first; left eye after.
- Standard Sloan optotypes (C D H K N O R S V Z) for clinical accuracy.
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By continuing you acknowledge this is a screening tool and not a medical diagnosis.
Clinically Accurate Snellen Test
Uses standard Sloan optotypes sized to Snellen physical standards — the same letters used by eye care professionals.
Screen Calibrated with Your Credit Card
Align your ISO 7810 credit card to the outline and get physically accurate letter sizes — not generic pixel guesses.
Right Eye and Left Eye Tested Separately
Detect asymmetric acuity that binocular tests miss — each eye is scored independently with its own Snellen result.