Free Online Eye Test
A free comprehensive eye screening tool with 8 vision tests you can take in your browser. Includes visual acuity with Landolt C rings (ISO 8596), near vision reading chart, astigmatism starburst, color vision plates, contrast sensitivity, Amsler grid for macular health, duochromatic balance, and peripheral visual field testing. Credit-card screen calibration plus a camera-free blind-spot test measure your real screen size and viewing distance, so optotypes are sized in true physical units — not guessed.
How to Take the Eye Test
Select your device type for optimized distance settings and input method.
Use a credit card (phone) or ruler (computer) to ensure optotypes are displayed at the correct physical size.
A quick blind-spot test (no camera needed) or your front camera measures how far you sit from the screen — no need to sit at an exact mark. Then maximize screen brightness.
Take each test covering acuity, near vision, astigmatism, color, contrast, Amsler grid, red-green balance, and visual field.
Get your Snellen equivalent, age-adjusted interpretation, per-test breakdown, and personalized recommendations.
Check your visual acuity, near vision, astigmatism, contrast sensitivity, and peripheral vision from any device
- A credit card or ruler for screen calibration
- A well-lit room with your screen at eye level
- Something to cover one eye (hand or paper)
- 8–15 minutes of uninterrupted time
Screening test — not a clinical diagnosis
Accurate calibration is essential for reliable results.
Why it matters: a 20/20 optotype is tiny and its correct size changes with distance — a wrong distance makes every acuity result wrong.
Keep the same distance throughout the entire test.
