A minimum screen resolution of 1366×768 is required

Please note you will not be able to use the software until you are emailed a user name and password by your vision therapy provider.

Before you can use the software, you must take a few measurements on your computer monitor, which requires a metric measuring tape.  If you don’t have one, a printable one can be downloaded here. 

  Windows (7 and higher, 32 and 64 bit)

  • Download the installer file here.
  • Run the installer.  A shortcut will be added to your desktop.
  • Double click on the shortcut to start.
  • Windows may try to block the installation saying it’s an “unrecognized app” or from an “unknown publisher.” You can proceed by clicking on “more info” and then “run anyway.”
  • Some versions of Windows 10 and 11 are setup to only allow installation of software from the Windows Store. You can get around this by switching out of S mode.

  Linux (X86, 64 bit)

  • This version was built on Kubuntu 20.04, but it should theoretically run on any recent Linux distro.
  • Click here to download
  • Extract the zip file in whatever directory you want.  This will create a new folder called “Tritheia” and a startup script called “”
  • Click on the startup script to run. Depending on the distro, you may need to set the file permissions to be executable.
  • If there’s any interest in a Raspberry Pi version, let me know.
  • If it doesn’t work with your distro, please let me know.

  MacOS (10.12 Sierra or newer)

  • Click on this link to download the zip file.
  • Open the zip file. The app should extract itself. You can then drag the app to your desktop or applications folder if you like.
  • Right click or Ctrl + click on the app, and select “open.”  If you left click, it may not allow you to run it for the first time.
  • You may see a message that says “Tritheia is from an unidentified developer.  Are you sure you want to open it?,” don’t worry, it’s safe to proceed.  Go here to learn more about this.


Will it run on Chromebook, Android, or iOS?

  • It’s possible to run it on many Chromebooks with an Intel processor by enabling Linux apps and installing the Linux version. If it’s a Chromebook from school they have probably disabled this feature.  Here is a howto from Google.
  • As far as Anrdoid and iOS are concerned, the short answer is “no.”  It may run on Android devices with larger screens in the future, but there are no immediate plans to port it at this time. It will likely never run on iOS due to Apple’s strict app store rules.