Hold a standard bank/ID card against the screen and drag the right edge of the blue rectangle until it matches the card width exactly (85.6 mm).
Sit exactly 60 cm from the screen. Cover the other eye completely. Keep glasses or contacts on if you normally wear them.
Read the highlighted row · tap each letter you can see · confirm when done.
Tap to select · tap again to deselect.
Review your results below.
| LogMAR | Snellen m | Snellen ft | Decimal | MAR | Letter @ 60 cm | Result |
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