Visual Acuity Test
Check your eyesight and visual clarity with this interactive screening simulation.
Important Disclaimer
This is not a medical test. It is an interactive simulation for educational purposes only. For accurate vision assessment, please consult with a qualified eye care professional.
How It Works
Sit comfortably at arm's length from your screen
Optional: Cover one eye to test each eye separately
Identify letters that appear on screen
10 levels - letters get progressively smaller
Choose correctly from 4 options
Frequently Asked Questions
Is this online visual acuity test a replacement for an eye exam?
No. This is an interactive screening simulation for educational purposes only and is not a medical test. For an accurate diagnosis, see a qualified optometrist or ophthalmologist.
How does the online eyesight test work?
Letters are displayed at progressively smaller sizes across 10 levels, from a 20/200 equivalent down to 20/20. You identify each letter from four options, and the smallest size you can read estimates your visual acuity.
How should I set up my screen for accurate results?
Sit at roughly arm's length from the screen in a well-lit room and keep your display at its normal brightness. Because screen size, resolution, and viewing distance vary, the results are an approximation rather than a clinical measurement.
Can I test each eye separately?
Yes. Cover one eye with your hand and complete the test, then repeat with the other eye. This can help you notice differences between your eyes, though it is not a substitute for a professional examination.
About this test
This page has not been reviewed by a clinician. It is written by the site author, who is a developer, not a medical professional. Where a reviewer exists they are named here; no credentials are claimed that we do not have.
How this test works
Letters are drawn at decreasing sizes in the browser, following the idea behind the Snellen chart. A real acuity test depends on a fixed 20-foot (6-metre) viewing distance and a calibrated chart size; neither can be controlled on your screen, so this simulation cannot produce a genuine 20/20-style measurement.
References
- Visual acuity test (Snellen test) — MedlinePlus, U.S. National Library of Medicine (NIH). Describes the standardised Snellen chart procedure read at 20 feet (6 metres)