Vision tests you can take on your screen
Simplified versions of the checks an eye doctor does in the office: visual acuity, astigmatism, distortion in central vision, color vision and more. They can’t diagnose anything, but they can help you notice when it’s time to see a doctor and track changes over time.
Skip the tests and see a doctor todayChoose a test
What’s bothering you?
Pick what’s bothering you — the tests that fit will move to the top, in order.
- start hereVisual acuityTumbling E chart4 min1.5–4 mone eye at a timecalibration neededStart test
- AstigmatismClock dial chart2 min1–2 mone eye at a time
- Amsler gridDistortion in central vision2 min30–35 cmone eye at a timecalibration needed
- Color visionNumbers made of colored dots2 min50–70 cmboth eyes
- Contrast sensitivityFaint letters on a light background3 min1 mboth eyes or one at a time
- Red-green testDo your glasses fit1 min2–3 mone eye at a time
- Near visionSmall print and age2 min40 cmboth eyes or one at a timecalibration needed
Setup
Before you start
- 01BrightnessTurn screen brightness all the way up (or close to it), with no glare from windows or lamps.
- 02GlassesIf you wear glasses or contacts for this distance, take the test with them on — then, if you like, without them.
- 03DistanceStand at the distance the test asks for; a tape measure or counting steps will help you measure it.
- 04A helperIt helps to have someone else press the buttons for you while you stand away from the screen.
Screen calibration
These tests size their symbols in millimeters, but your screen doesn’t know its own size. Show it with a card — once for this browser.
Screen calibrationnot calibrated
Know the limits
What these tests can’t do
A medical measurementScreens vary in brightness, color and contrast, so results are approximate, not a medical measurement.
A retina or nerve checkA good result doesn’t rule out glaucoma, diabetic retinopathy or retinal disease: in the early stages they don’t affect visual acuity.
A replacement for an eye examChildren under 7, people with diabetes, a family history of glaucoma, or anyone over 40 need regular in-person eye exams, even if they pass every test.
A glasses prescriptionThese tests can’t prescribe glasses: a prescription is written only after a refraction by an eye care professional.
An on-screen test is a rough guide, not a diagnosis. Results depend on your screen, lighting and distance; if you have any doubts or your vision gets worse, see an eye doctor.