Check each eye,
one step at a time.
Follow the setup carefully, then identify which way each E is facing. Your answers are scored on this device only.
Set up your screen
ABOUT 3 MINUse a desktop monitor or tablet in a well-lit room. Calibrate the chart with a standard bank or credit card, which is about 85.6 mm wide.
Keep browser zoom at 100%. Recalibrate if you resize the window or change zoom.
Before you begin
- Sit or stand exactly 3 metres (10 feet) from the screen.
- Wear your usual distance glasses if you normally use them.
- Cover one eye gently without pressing it, then test the other.
- Choose the direction the E's open side points. Guessing is okay; use the same distance throughout.
Test one eye at a time and avoid reflections. This simple check does not test color vision, side vision, eye pressure, or eye health.
Check your right eye first, then switch and check your left eye.
What this can and cannot tell you
The chart estimates how small a tumbling E you could identify at the stated distance. It does not check for glaucoma, retinal problems, color vision, peripheral vision, or other eye conditions. A comprehensive eye exam is more accurate and can find problems a home check misses. Read the American Academy of Ophthalmology’s home-test guidance.
When to get care
Arrange an eye exam if you have ongoing blur, headaches while reading, or a noticeable difference between eyes. A good score does not rule out an eye problem.
Sudden vision loss, new flashes or floaters, a dark curtain or shadow, or eye pain? Stop the test and seek urgent eye care. NHS guidance on flashes and floaters.