Online Eye Test Chart
Check your vision with our free eye test charts
Eye Test Chart
Visual acuity measurement: 20/20
Chart Type
Screen Size Calibration
Adjust the slider until the ruler above measures exactly 10 cm (100 mm)
The standard test distance for Snellen charts is 20 feet (6 meters). For at-home use, please stand at least 10 feet (3 meters) away from your screen.
To ensure accurate results, please do one eye at a time (cover the other eye).
Note: These charts are sourced from the internet and are provided for informational purposes only. We cannot guarantee their accuracy. For a professional eye examination, please consult an eye care specialist.
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How to Use the Online Eye Test Chart
- Position yourself at a distance of 10-20 feet (3-6 meters) from your screen
- Use the calibration ruler to ensure proper sizing of the chart
- Test one eye at a time (cover the other eye with your hand or card)
- Start reading from the top line and proceed downward
- The smallest line you can read accurately determines your visual acuity
- For printing, use the print button for a properly formatted chart
Important Notes
- This online eye test is not a substitute for a professional eye examination
- If you experience difficulty reading the smaller lines, consult an eye care professional
- For best results, ensure proper lighting and screen brightness
- The calibration ruler helps adjust the chart to the correct physical size
- Children's test charts use simple pictures for those who cannot read letters
- The "Tumbling E" chart is useful for non-readers or international users
Understanding Visual Acuity Results
- 20/20 vision is considered normal visual acuity
- 20/40 means you must be 20 feet away to see what a person with normal vision can see at 40 feet
- 20/200 or worse (in your better eye with correction) is considered legally blind in the US
- If your result is below 20/40, you should consult an optometrist or ophthalmologist