I recently built EyeTest Online, a free browser-based toolkit for basic vision screening.
The idea was simple: many common eye checks can be presented as lightweight interactive web tools without requiring an app, account, or installation.
What's included
EyeTest Online currently includes several types of vision screening tools:
- Visual acuity tests
- Color blindness tests
- Astigmatism tests
- Contrast sensitivity tests
- Amsler grid tests
- Peripheral vision checks
- Near vision tests
Everything runs directly in the browser and works on both desktop and mobile devices.
Why build it as a web app?
I wanted the experience to be as simple as possible:
- Open the website
- Choose a test
- Follow the calibration instructions
- Start immediately
No account creation and no installation.
For tools like this, reducing friction matters a lot. Someone who just wants to do a quick vision check shouldn't need to download an app first.
An important limitation
These tools are designed for screening and general awareness only.
They are not medical diagnoses and should not replace an examination by an optometrist or ophthalmologist.
Try it
You can try the tests here:
I'm continuing to improve the calibration, mobile experience, and accessibility of the tests.
Feedback is welcome, especially from people interested in accessibility, health tools, or browser-based utilities.
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