The Freiburg Vison Test, FrACT, now has gained contrast threshold assessment in its all-platform version FrACT₁₀. [An isolated version, allowing full-screen takeover, is here.] It is based on JavaScript and thus can run in any current browser on any platform, including large touch devices (on-line only).

At this time FrACT₁₀ has the following options

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

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