the professional eyechart in your browser


WolfChart is a professional tool for measuring visual acuity and performing other distance refraction tests. It is NOT a substitute for an eye examination with a qualified optometrist or eye doctor. If you are experiencing problems with your eyes or vision, do not use WolfChart; instead consult an optometrist or doctor as soon as possible.

Get started right now...

The latest version of WolfChart is online now. The link will open a new tab in your browser.


Use WolfChart offline...

WolfChart is 100% javascript, so it works without an internet connection once open in your browser. You WILL need to first download it from the internet though. Save the archive somewhere nice, unzip it and read the readme file.


Get the app...

The app version of WolfChart is great for tablets and smartTVs. It's available for both Android and iOS for a small charge.