Use of the dynamic visual acutiy system and home vestibular rehabilitation software requires a head movement sensor and appropriate driver software to be installed on your computer. The appropriate drivers can be downloaded here:

Windows (32 bit).

Windows (64 bit).

Macintosh (OS X).

After the driver is downloaded and installed you should open system preferences (Macintosh) or the control panel (Windows) and make sure the webservices are enabled.
Although drivers can also be downloaded from the sensor manufacturer (Phidgets) we do not recommend this as the drivers are frequently updated and the latest version may have compatibility problems with our software.