The Freiburg Vison Test (FrACT) started thirty-five (35) years ago! It now graduated to FrACT₁₀. The latter is based on JavaScript and thus can run in any current browser on any platform, including large touch devices (on-line only). An isolated version, allowing full-screen takeover, is here.

At this time FrACT₁₀ has the following options

What FrACT₁₀ doesn’t do as yet, but it’s being planned

I’m now awaiting feedback on possible bugs and needs for additional features.

For “production environments”, e.g. clinical studies, you should stick to the proven and “grandfathered” classic FrACT, currently at version 3.10.5.