You'll see rows of the letter E pointing in different directions.
For each letter, press the arrow key (or button) matching the direction the E's
prongs point. Sit at your calibrated viewing distance
(—) and cover one eye.
Run the test once per eye.
Which direction does the highlighted E point?
Result
American (Snellen)
European (metric)
Decimal
logMAR
Medical disclaimer: This is a screening tool that is still in development, not a medical diagnosis.
Results depend on screen calibration, lighting and distance. Consult an eye-care
professional for any concerns about your vision.
Medical disclaimer: These are screening tools only and are still in development, not a medical diagnosis.
Consult an eye-care professional for any concerns about your vision.